One thing I rarely see used here are balloons popped either on someone's head/body or in someone's clothes, ideally with messy substances in the balloons themselves that ooze out the bottom of their shirt, pants, or underwear. I'm wondering if there's a niche for this!

(For me personally, I just picked up this set and am picturing getting pied/slimed first, then getting the balloons popped, full of whipping cream or something similarly runny and gooey...)