LOL this is pretty good.
if you are driving, and your friend is driving, both of you stopped
beside one another at a traffic light.
Roll down your windows and signal to him that you wanna talk to him
or something, he will den roll down his windows, just as he finish
rolling down, roll back up your windows and look straight in front
and pretend nothing happen.
better still if he's is manual kind of windows and not
powered...