Not really significant, but I just found a glitch or something, after you stab someone, if you do a taunt, it increases damage like a power up, i just did a 278% combo with Kung Lao with one combo, You can try it your self, I dont know who else it works with but do this...

1. Go to practice
2. Get Kung Lao
3. Impale your opponent
4. Taunt a lot of times, (Try to taunt and then move up because your tant pushes you back and I dont know long you have to do the move ,I did 30 times for the 278%)
5. power up
6. do the 1,1,1,cs,2,4,3 combo anywhere
7. Watch the huge numbers come onto the screen

Maybe this has something to do with fatalities, because I have seen the computer do multiple taunts after a match.