You can click the numerical keys to have your character exhibit various facial expressions and the AFK animation while standing still.
It would be nice to have access to the falling animation in the same manner (because it would make your glitch look seated), the jumping animation (while remaining on the ground, to show enthusiasm) and any of the other animations you could give us.
This'd allow for a greater depth in expressing things via your Avatar, and shouldn't require more than a UI expansion (rather than adding new poses and etc).