I'm always doing this in work but the funniest time was when me and my friand attacked our old boss lol! He was in the office with the door open so we crept up on him behind this roll cage packed with stuff! We crept closer and closer until we were at a close enough distance to get some good shots - we let loose on him and they were going everywhere, bouncing off his head and his hands lol!! Do you know what he did? NOTHING - didn't tell us off or join in, what a spoil sport!