Human Bowling Ball
You become a huge, plastic bowling ball and run up and knock the pins down. It's simple, awesome fun.
The product description says it's for ages 5-12, but who are they kidding? If an adult shells out the $4500 for this crazy thing, they're going to want to try it! Especially if there is alcohol involved. Which really sounds like a fun combination.
Here's a vid of it in action at a San Diego Padres game: