For me it helped to not try to memorize or predict the erratic movements of the two guys, but simply reacting to it with a constant delay of about half a second. The game accepts that (I think as long as the delay stays the same and you don't switch back to predicting in the middle). The first five or six times I tried to predict their motions and failed horribly. After that I switched to the reaction method and won three times in a row since then, once even with the best applause.