" 

 == I don't think it's possible to hit your chest with your balls. == 

 The articel reads: 

 ""The Double Back - Steve-O swings his penis back and forth with enough momentum for his balls to hit his chest twice, then catching his genitals with his inner thighs he jumps and spins 180 degrees."" 

 This would only be possible if your scrotum hung down a foot or more."