Absolutely nothing. This is the cutest thing ever.
On The Tonight Show, Jimmy teamed up with Cookie Monster, Elmo, Big Bird and the Count, among others, to hide behind unsuspecting kids and pop up in the background of pictures they were taking in a photo studio.
While the shenanigans Jimmy and all your childhood puppet heroes get into as the kids get their pictures taken is adorable all on its own, there is nothing cuter than the moment the kids realize who's behind them and their faces absolutely light up.
Be honest, don't you wish you could give Big Bird a hug?
Of course you do! We all know it'd be the best hug ever.