At a USAF civilian auxiliary encampment I got to sit in one of those big yellow airport fire trucks, the kind with the huge water cannon, bright yellow paint, slanted "cockpit" widow, joystick+cameras inside, etc. It was amazing. Then they had my squadron put on PTs, marched us in formation into a gravel drainage trap, and shot the cannon up at like 60° to create a rainstorm above us. Fun times.