Awesome, it's totally replicable too. PLEASE DON'T PATCH THIS, TN!!!
To do that glitch you just have to KO the character with Honoka's Power Launcher, or with nyo's wind-blow at a certain distance (more difficult to do)
The first way to do that was to trigger a cliffhanger animation with Nyo's wind-blow.
I've been messing with all the glitch in DOA5/DOA5U/DOA5LR and I do know them very well haha.
It would be a shame to patch those, they pretty are funny and don't alter the game experience. ^^