If you dance with Vel and taunt immediately after, the alien text floats above his screen.

I tried to take a screenshot of this in-game but failed. This may be the most minor bug of all time, but thought I'd report it anyway.

Basically, dance->taunt and his text will float above the screen. If you taunt again afterwards, it will be back to normal. I should also add that I did this with Battlecast Vel'Koz.