Cody "silent" bad stone?

hey ive seen a video of a cody player doing a bad stone but the thing was he was doing the input where cody held his hand on the ground for a split second and he did not say “ha ha.”

Can anyone describe how this silent rock works and if so. Are there any yt vids for more reference thanks!

https://www.youtube.com/watch?v=6FwfUkMpT08

Perfect badstone. Charge HP Badstone up to level 2 (Minimum 22F charge) release it’ll have twice as long from release -> active than other badstones but half as much recovery. You are +14F on hit minimum with a L2 HP badstone. If the opponent tries to do anything once the attack is actually active it’s most likely blockable.

https://www.youtube.com/watch?v=IJ5D9-k2icg

There is plenty of tech to be potentially explored with it.