Here is a different one. Hold your left foot with your right hand and then without letting go, jump your right foot through the loop. My kids can do it, me and my siblings can do it, my dad could do it. Other then family, I've only met 1 other person that could do it. Then to make it tougher, try to jump both forward and backward through the loop, my son is the only one I've seen that can go both directions.