I'm doing a commercial for school. The theme is Casio camera...I NEED IDEAS!!!!?

I am using imovie 08 to edit this. Do you know of any good effects or ideas I could use to make my commercial better. What I am doing is recording a video of someone doing something...example:jumping on the trampoline and then having a flash and making a picture out one clip from the video. Is that a good idea? Any other ideas??? I need effects too!