For the same reason Terry can sometimes cross up Honda.
She was probably trying to c.fp AA you and it put her sprite in the j.rh hitbox before her hitbox appeared. It happens alot on short jump on large sprite chars too.
you can get lucky crossing up some others large characters if they duck too. but don’t count on it
Use a lvl 1 raging storm instead…much flashier…same damage. 
I use lvl 1 shine knuckle because it will always hit… i think raging storm only works in the corner but i’m not sure… anyways… Rock-sama… when are you coming to ucr… I played 3 rock players today that i didn’t know and beat all of them… were you one of them?
lol … i was the fattest of all of them… hehehe no i havent had a chance to go. but im gonna try to on next friday. i played this guy one day that used rock, ? , and mai that got pissed of at my nakoruru a month ago; knew some guy that plays hibiki…? anyway try to go next friday like after ten am. until like 5 cuz im gonna make a day out of it. r u going to ucla on sat for the little tourney? ill be there too. ill be at camelot today too. (this friday)
I use j. rh, c.rh, lvl2 raising storm xx power dunk cuz i like to be flashy:D and i can build up gauge fast 2 do it again. 
hmmm… i dunno… i’m the only one there that has a decent rock… I’ve used mai in a-groove before but it was only once or twice so i doubt it was you that i played… if you played the guy that beats people pretty bad with hibiki… thats my friend pep… just come to ucr next weekend… I’ll play you some cammy vs. rock for money if you still want to
This makes me want to cry, because Rock became my favorite character for SURE after a while, but he basically sucks, although I don’t play the experts. This is one of the minor reasons I sold my import DC copy; the major reason being that NO ONE at UCLA seemed to be playing it for a LONG time, so I had no incentive to practice parry, JD, and combos at home. I’m glad to see ppl still play at UCLA, again!
I came up with some decent combos for many characters in whom I was interested, but then I later realized that using multiple weak attacks to “buffer” into supers (if possible) instead of using 1 strong or forward hit is MUCH better because it gives you more time to react to opponents’ mistakes, like whiffing their moves, but ALSO, now that I think it over some more right now, if they’re blocking and you simply want to build meter, work toward the guard-crush and/or apply more pressure, it’s harder to punish blocked jabs or shorts than some strongs or forwards that have lag on them.
I was going for most damage, but for one thing, lower-damage combos can be more practical if they’re harder to screw up, which would otherwise leave you vulnerable (provided that the bufferable weak attack is just as easy or EASIER to buffer into than the medium attacks), and secondly, I was using my trusty-but-lame STANDARD DC controller, which makes use of the shoulder buttons nearly impossible for combos, and they are the buttons to which I’ve relegated my jabs and shorts.
I got a question for you guys/gals though: before I didn’t know there were TONS of links in this game, my favorite basic combo in the game (just fun for me) was with Rock and it was/is:
Jump-in Rh, low St/Fw, Level-2 SK, Fr Rising Tackle (esp. in the corner)
and what I want to know is, is it my imagination, or are Rock’s low Strongs and Forwards VERY weird bufferable attacks? I find the timing from either attack into the Level-2 SK VERY odd. I think you have to combo into the super earlier with the Strong than with the Forward, and lately I’ve actually preferred using the Strong in the arcades–perhaps because I SUCK WITH JOYSTICKS!!! I used to prefer the low Forward at home, when practicing combos 
Btw: I also find it easier to cancel into Level-3 SK after the Shinku Nage, as opposed to cancelling into the command follow-up Nage (sp?) Blast, but that’s just me, I guess!!!
'and as for link combos, well…it’s hard to practice if you have to use the DC controller’s shoulder buttons! I’m fairly fast/dexterous at comboing/“buffering” into supers, but not good enough to rely on the shoulder buttons for that 
Gotta practice using the proper range of the Rh Rage Run to cancel into the Shinku Nage since it’s almost the poor man’s replacement for Rock’s COMPLETE LACK of a cross-up, which is needed for higher-level play :resumes weeping:
Oh YEAH! if I can just get GOOD with Kyo, I can have tons of juggling fun, regardless of the groove I pick! :wipes tear: :'D
yeah sure why not, i prove that i know my shit. ill be there from about 10 am to like 5 pm i dont think youll miss me. N-groove rock, nako, and ken/sagat. and anyone else i might just get to.
IF ANYONE AROUND THE AREA IS ABLE TO GO, GO!
This Friday! sorry
Hey uh… I started messing with P Groove Rock again…
There is this wierd thing I ran into. Nothing big but just strange.
I was in training mode getting the hang of him again, and I was just screwing around with stupid combos. I was 1P with CPU against the 2P corner, and I did j.fk -> stand close fk XX Rage Run Shift, and if I buffered the Shift really quickly, Rock didn’t teleport behind - he teleported, but stayed in front. If I delayed the cancel a little, he went behind. If I did it midscreen, he wend behind. When I did it in the other corner, he went behind. But I could consistently get him to Shift and not go behind in the 2P corner if I canceled from close fk really quickly, every time I tried it.
Wtf?
Glitch
its a glitch that happens under certain cicumastances, if you read the past rock threads they explain it in full…
This glitch can lead to good mixups on opponents who think your going in back of them…
Try this one i made up:
In corner: Run type shift, 360 grab, rasaka(blue light), Fk then
combo into run type shift, and it wont go behind them, when they
land 360 grab, rasaka, this works very well and can be done very fast if timed correctly, try it, its not that hard…
Its kind of a reset, okay it is a reset…
hope this helps:)
Go to the old rock thread the bug is explained better there. Or at least somewhat.