I know you're making a joke here, but I actually do speak ASL (American Sign Language) and believe it or not he's using bit of it here, though it's completely incorrect. When he's throwing up his left hand with his thumb, index, and pinkie fingers extended, that's the sign for "I love you". Or rather it would be if it wasn't sideways and he had his palm pointed away from him, like Spiderman when he's shooting webs.
As a little bonus, here's his favorite go to phrase of "Do wha?" in ASL.
Thanks for coming to my TED Talk.