A little guy was sitting in a bar, drinking his cold draft and minding his own business when, without provocation, a great big dude came in and *WHACK!* knocks him clean off the bar stool and onto the floor. Then big dude blurts out, "That was a karate chop from Korea!" The little guy thinks to himself, "GEEZ," but all he does is gets back up on the stool and starts drinking again.
All of a sudden - WHACK!! -- the big dude knocks him down AGAIN and says, "That was a judo chop from Japan." The little guy has had enough of this unruly martial artist. He gets up, brushes himself off and quietly leaves the bar.
The little guy is gone for about 25 minutes. Then he returns to the bar. Without saying a word, he walks up behind the big dude and BONG! -- knocks the big dude off his stool, knocking him out cold. The little guy looks at the bartender and says, "When he comes to, tell him 'that was a crowbar from Home Depot'."