What is a fun childish thing you still do as an adult?
For me, it's sticking my hand out of the window of a moving car. Whether I'm driving or not, I love having the windows down and waving my hand in the wind. I've loved it since I was a child and I'll never stop doing it!
On a similar note, they make healies in adult sizes. Got a pair for my 21st as a gag gift, and ended up using them to walk my dog all the time. He's a lil guy, but hes a dense 15lbs of muscle and he could pretty easily pull me up to that "oh shit" speed.
I remember there being a guy in one of my college classes who’d roll down the aisle of the lecture hall on healies to his seat everyday. What a legend.
I love skating in the parking lot with an empty shopping cart! But since I had a little unhappy accident I'm a bit afraid of using a cart full of groceries.