One of Austin's new tricks is giving "high fives." He gets very excited when you ask him for one too. It perks him up even if he's tired or cranky. His aim isn't always good, as you can see in the video and we're working on him doing it with his right hand too. Since he mostly learned it with his left hand he gets confused some.
One time I was holding him with his left side against me and Brian went to give him a high five on Austin's right hand and Austin got excited and started smacking me in the side of the head with his left hand. He's getting it figured out though.