[mike-cardwell]

Surely that would be a thumbs up/down motion in the manner that Romans used to decide the fate of gladiators.

[intended]

Honestly a lot of gestures based controls of the floating in mid air kind are prone to tiring you out.

I suspect that unless there is some form of support, this may be like drinking Pepsi: Sweet on the first sip, but after a while, not as great.