Mortal Kombat - Tournament Edition (GBA) - tag-mode fatality glitch
The computer opponent can do a fatality in circumstances in which you can't, for example, when either player is in air. With a properly timed "tag" action, you can cause displaced fatalities by ending up too far from your opponent. The game doesn't re-position you for some reason when doing this, unlike normally.
The second clip shows your character actually ending outside bounds momentarily until the game figures out where he is actually supposed to be. It's a shame it doesn't seem likely that you can get oob in other circumstances using "tag", though.
The third clip is a bonus clip, showing an oddity with Sektor's teleport punch and "tag". Done at a correct frame, Sektor ends up at the far back end of the screen instead of the middle like he always otherwise does with this attack.
I'm still thinking of doing a playaround TAS of this game...