One of my dad's friends wanted me to take a water cooler jug and fill it with liquid hydrogen to use as a fuel tank for a rocket. I actually think he was serious, maybe you could talk with him.
Be careful though, he's kinda crazy. He had a gyrocopter and crashed landed on top of the police station.
WWWWEEEEEEEEERRRRRRREEEEEEEERRRRRR
Dad: Hey look, there's Tim
Mom: Where?
Dad: He's up there in that thing making all the noise
WWWWEEEEEERRRRR.... put put sputter sputter pfffffff
Dad: Uh oh
Hours later
Tim: Hey Darrell, can you come bail me out?
No kidding