Well, Tony figured when in what's left of Asgard on Earth, do as the Asgardians do. He snagged more party punch and downed it in one go before hopping up on the couch and dancing next to Val, in severely drunken and idiotic ways. Was that an attempt to twerking along with the beat? Maybe. Sorta. Not really. It was something that looked like he was dancing, and then ended up with him simply pogo bouncing on the couch up and down a lot.
He was cracking up laughing regardless of whatever dance move he was doing. At some point, his neon pink bra tiara fell off.
It was also pretty nice not to care about anything for a night. If he ended up videoed and it was thrown up on the internet? There'd been way worse scandals he'd lived through. It wasn't even a concern as much as the need to cut loose and have fun.