a capoeira variation of a one handed cartwheel, in which one or both legs hit your opponent in the temple. usually only the last leg will hit, and only with the heel for maximum efficiency. this is a very confusing attack, but is highly effective when done right. usually someone hit by this is knocked unconcious. [Aranha]
it goes forwards rather than sideways. It's sort of like a judo roll with one hand on the floor.
put your left hand on the floor in front of your right foot (fingers pointing right and sightly backwards), at the same time kick your left leg backwards and up and over your torso. Your body should spin on a sort-of diagonal axis, and your right leg will follow. Bend your left leg as you land but keep the right leg out straight. You should be kicking down with the heel of your right leg to strike the target between 1 and 2 feet off the floor. Try not to let your heel hit the floor.