The act of creating pieces of poo that when falling in the toilet, creates a splash that goes up to your anus and makes you wet. Obviously made when taking a dump.
When Christina tells her friends about having suicide water bombs, the guys overhear the part of her getting wet. They then get aroused.
When you’re in a public place late at night after any potential bathrooms are no longer available to you, so in desperation you end up peeing on a brick wall or other property. This spot effectively becomes your backrock water park and you’ll never be able to walk past it again without thinking back.
I won't go to Edmonton's any more. Too many people I know have at one point or another used it as a backrock water park.