This video demonstrates exactly why you shouldn't use a moped to power a roundabout with someone on it.

The group of friends used the two-wheeled vehicle to propel a roundabout in Frösunda, Sweden, making it reach dangerously high speeds.

"We decided to spice it up and put the back wheel of my friend's moped on to the roundabout to speed it up," said Elias, who filmed this video.

As the moped speeds up, the man in the roundabout slowly loses his grip and eventually flies off injuring himself.

Elias added: "My crazy friend hopped on to the roundabout and yelled 'max throttle'. Because of the high speed of the roundabout, he fell off and hurt himself a little. He then saw the video and said wanted me to upload it.

"He wasn't badly injured at all, he had back pains for an hour or two but then it disappeared."

This dangerous stunt was filmed in July 2017.

I and my friends were just chilling in a park in Frösunda in Sweden. We were bored and decided to test the new roundabout. But from the beginning, it was very boring because of the slow speed. Then we decided to spice it up and put the back wheel of my friend's moped on to the roundabout to speed it up. Then my crazy friend hoped on to the roundabout and yelled "Max throttle" right before I started to record. Because of the high speed of the roundabout, he fell off and hurt himself a little. He wasn't injured badly at all. He had back pains for an hour or two but then it disappeared. You couldn't see anything and he was totally fine just one or two hours after. And as I said he wanted it to be uploaded to youtube and to the public himself. There weren't any bruises.

So I have his permission to show it to the public.