This movie was a satire. If peeps could wake up simply by hitting each other with balloons, then everyone would be using balloons. If the only way you can stop thinking is to hit yourself with something, then do it, but sooner or later your arm will get tired, and you'll realize that you'll have to find another way. IMO, the easiest way is to shift attention away from thoughts to what you can see or hear. In this way your arm won't get tired and your face won't get red from being bashed. However, if you ATA, don't check on your progress. Just do it.
