I'd add to this on people who punish TKs in-game. This is why people stop to say sorry because they're afraid that the person will punish and ruin the rest of the match for them. (You know how it is when you have high TK points and friendlys are running into shots.
Melee Kata - Press both attack buttons at the same time
Flying Kick - Hold Use, Forward, Attack 2
Leg Sweep - Hold Use, Crouch, Attack 2
Uppercut - Hold Use, Forward, Attack 1