Colleen and another tall girl were playing basketball against two young kids, easily beating them so I joined the little kids' team to help even the game. Colleen jumped onto my back to slow me down, but I still while lying down on the sidelines, trying to throw the ball to the smaller kids. Eventually I was able to get up and do slam dunks with Colleen piggybacking me; I was pretty impressed, but I figured my body had just gotten used to having my heavy backpack all the time and Colleen was no heavier.