"Eh. You weigh nothing. I could lift you up with one hand." Slight exaggeration, but probably not actually by much, which was why Sirius got the bright idea to wrap his arms around Remus next chance he got, lift him up and do a little twirl. All right, it didn't fit a tango, but it was pretty hilarious. He was laughing, so he just hugged Remus close after he set him down, a little bit out of breath. "Don't worry, I got you."

He wouldn't let him fall or anything.