Roll Down a Hill in a Bubble
You're probably wondering why it makes sense to roll down a hill inside a big ball / bubble. This is called zorbing. I could provide an answer for you, but you can look at what they say at the Zorb website instead, which explains, "It was kind of fun on water, but exhausting and after being blown out to sea a few times they realised it was more work than it was worth. BUT ... the same device could be used to roll down hills. This was fantastic fun, extremely bizarre, and bizarrely extreme." Yes, hills... those are things I always wanted to climb into a ball in order to roll down.