Stunts/Funny stuff ideas needed for video

[40 cent]

Me and a few of my friends are making a dvd as a brithday present for one of our mates, and i need a few ideas of some funny stuff we can do on the video.

Obviously i dont want anyone hurt, and i dont intend on going car surfing down busy streets or anything, but i want things that are at least mildly entertaining without being a knobhead and disturbing/hurting anyone. (at least anyone who isnt involved )

So anything from stunts, to skits, to just stupid stuff...

cheers guys

and yes, i realise this is immature, im happy to live with that fact.