When I was at school in Vancouver, I joined a group of longboarders who bombed a 6-level parkade when it was wet outside and a 3-mile hill going all the way from the campus to the beach at night. I got most of my road rash there, I learned how to longboard mostly drunk and / or high and it was absolutely brilliant.
On Saturday nights when it was raining, the parkade was packed with between 40 and 100 longboarders racing down the spirals, playing longboard hockey in the basement floor, playing music and having a raunchy good time. So good a time in fact that when campus security showed up, they usually cruised through the parkade once, then left and radioed for police support to disperse the crowd of no-gooders.
I miss that parkade.