I’d genuinely be surprised if you can’t SPD shotos out of Shoryukens pre-ST. I’m 100% sure I’ve seen it before, thought it was probably CPU 'Gief…even so, the CPU tends to change the excecution of moves (walking flash kick with CPU Guile, random chains that don’t actually work for human players, etc), and doesn’t change their speed/hitboxes/throw range.
You can throw people out of V-ISM activation, but if you don’t complete the throw and actually grab them before the screen freezes, the throw will always whiff right afterward (don’t know about Raging Demon or other throws that move forward). At least, I think so…
There are usually five frames before the screen freezes when you activate V-ISM…they’re invincible, but who knows if they’re all throwable? Maybe a few frames are unthrowable? I assume, at least that they’re all throwable. It’s especially odd with SPD, since it’s instant in A3 and all games made before it (possible exception to the VS games), so it should never whiff. SPD, like most throws, can only actually throw for one frame, so it would be possible to miss something unthrowable, and do the whiff animation- perhaps the V-ISM activation messes with things. To be fair, I’m not sure I specifically remember seeing SPD whiff, but it sounds familiar.
Final Atomic Buster is invincible before the screen freezes, and only one frame afterward, at all 3 levels. So there’s not a point where he’s both invincible AND can throw you, but he throws on the very next frame, the first opportunity after time stops. So that was a bad example, I guess. I’ve seen Gief thrown out of 720 twice- I did it with Birdie vs CPU Zangief once, and I saw another Zangief player do it. AFAIK the same thing happend in both situations- 360 motion was done before the screen stopped, and the Gief doing the super got grabbed either on the first frame after (before he could throw), or the super was overridden by the throw that was done earlier and they were both active on the same frame, but the earlier one won. The only difference being that Birdie’s 360 needed to be done a bit sooner, since his throw is slower.
DP vs SPD in A3 would be a good test if it was a fierce DP, but since the character got grabbed, there was no way of knowing. Ryu’s Jab DP is fully invincible for 4 frames in A3, but is conditionally invincible for a while afterward (This is why Jab DP will trade/lose to low attacks, wheras Strong/Fierce won’t). So if it was a Jab DP, you could say that Zangief grabbed him on the fifth frame, when he’s not fully invincible. If it was a Strong or Fierce DP, that would be an example of Gief grabbing an invincible move.
Anyway, there are periods when you are unthrowable and not invincible at all (standing up from a knockdown, the start of the round in the Marvel games, hitstun (usually), ground recovery in the Alphas, the start of a jump (there seems to be a point where you’re not quite off of the ground, but can still avoid being thrown), etc. I’m pretty confident it’s something Capcom can toggle on/off and is independant of invincibility.
shinblanka- I’m pretty sure Honda can fly over low Tiger Shots in A3, so either Sagat’s low Tiger Shots are higher, or Honda’s hitbox is lower. I would guess the shots are higher.