"Scorched Colon"

I'm not the smartest guy in the world, but I'm pretty sure that launching fireworks out of your ass is never a good idea. This guy should stick with sparklers.

A man suffered internal burns when he tried to launch a rocket from his bottom on Bonfire Night.
Paramedics found the 22-year-old bleeding, with a Black Cat Thunderbolt Rocket lodged inside him, when they attended the scene in Sunderland.

He suffered a scorched colon and is now recovering in hospital, where his condition is described as stable.

A spokesman for the North East Ambulance Service (NEAS) said the prank could have been fatal.

...

"There's a lot of major blood vessels round that area, so infection would probably be a huge problem for him.

"And also the body naturally produces methane gas, so combine that with the firework and the exploding effect with methane's flammability - it certainly could have been a lot worse than it really was."