What do you do when your flying machine's broken but the engine still works? The magnificent man in this video decided to strap it on and ride his bike. Like you do.

The unnamed adrenaline junkie in this clip hails from Alachua, Florida, USA and decided it would be a good idea to power his bike with a great big propeller when he broke part of the frame needed to use it to power a parachute.

“I broke part of my paramotor frame and couldn’t fly but I still wanted to play with it,” he wrote. “I tried using it with a skateboard, but that ended badly… so then I jumped on my bicycle and took off!

"The bad: it shakes at high speeds (around 50MPH).

"The good: its super fun and it’s cheap on gas.”

Noticing that the bike being used here was a Trek, we asked the bike maker's opinion on this method of propulsion. A spokesperson told us: "Warranty voided."

Given that human daftness involving engines knows no limits, it's hardly susprising that this isn't the first time someone's strapped a propeller engine to a bike. Here's a bloke riding down a beach, which you'd think has the big advantage of having nothing to hit if you come off at 50mph. You might get a bit sandpapered though.

And here's another propeller enthusiast with twin, electric-powered engines.

Do we have to say 'Don't try this at home?' Don't try this at home.