Well, I'd say force of power (although not an intense one) that allows him to hover exerts an amount of pressure that although wouldn't read as his actual weight it would definitely register on a scale and set off a pressure sensor. A coworker also reminded me of another fact about the Hover's ability. He can only a foot above any surface so if he was top of a ladder activated his power and moved away from the ladder he would drop until he was a foot of the ground. Hearing Karma Komedian's name makes me think Kari Okey-doke would want to start singing "Kharma Chameleon".