Photo Scavenger Hunt?!?! HELP?

am planning a suprise Scavenger Hunt party for my bf's 25th bday. We split into teams of 5 and head onto the campus of University of Delaware (in town of Newark) and have to take pictures of your team doing certain tasks. We did this last year and it was a HUGE hit but my list was SO good that I dont think I can top it! HELP please??!?!

Here are a few examples from last year (1) doing a human pyramid with 2 strangers, (2) you and team with a stranger wearing a sombrero in front of mexican resturant, (3) using your body to spell out a word, (4) on a fire truck, (4) dressed as the village people. Just a few....

Ideas?!??!