Ever go to wave to a fellow motorcyclist and cram your your hand into your window...
...forgetting that your in your cage.
I do this often. I like to do stupid thing when waving to other bikes. Like throw my hand up real high and wave really hard like I actually know them and haven't seen them in years. lol. Gets a lot of looks. The two-handed shoot 'em up ''pew pew pew'' throws some guys for a loop,too. <- My personal favorite!
Gotta have fun with it.