There is this Japanese guy in circus, putting on a show. He says he can beat anybody - so a huge redneck goes in, tries to fight him, but the Japanese guy knocks him down in 20 seconds and says:
"This is from Japan, we call it Karate"
Another big guy goes down to fight this samurai, down flat in 10 seconds:
"This is also from Japan, we call it Judo"
Finally third guy walks in the circle, 5 seconds later, the Japanese guy is on the floor and this third guy says:
"This is from Japan too, lugnut wrench from Toyota."