Then what are they doing

Isn't training for combat situations a basic purpose of probably all martial arts? Maybe some drifted away from that or some are not very useful but it is why those practices started in the first place.
Actually I don't want to get involved in the these dumb arguments on the last page.
But here is a funny vid I saw the other day and it even might be somewhat relevant for the thread.
http://www.youtube.com/watch?v=C2DirtL7JBg
Check the K.O. that sends the white shirt guy down a second time
