Ok here is one straight out of the movie jackass, and Im pretty sure you will have a good time doing it too! Get a short metal bar or a piece of a broom stick, and lots of white guaze material. hold your elbows up, with you hands pointing to the floor, an wrap the bar and guaze around you biceps and back, so that it appears as if you have sustained a terrible upper body injury. Then you and your girlfriend or buddy go outside, somewhere that has alot of pedestrians. Unzip and undo you pants, so that you pants keep falling down but you cant do anything about it because your arms are tied up with the guaze, becuase of your terrible injury. Ask people that walk by to please help you pull up your pants and button them up.

If you or your buddy can provide a good video of you doing this succesfully get someone to pull up your trousers,I will give you 500 chips.