"Grand Ultimate Mantis Ground Boxing" (ie this is the ditang form of Taiji Tanglangquan)
Just came across this and really enjoyed watching it for several reasons:
Very athletic and demanding style
Master is a bit of a character - you would not want to spill his pint
His student looks very, very skilled
And in the middle of it, he makes a plea for his art's continued practice - "If don't keep practicing this art, we will feel guilty to the ancestors."
Amen to that.
http://www.youtube.com/watch?v=JRwBA-X_qWk