Hold on to yer bits!
He got his first ride when he was only ten and has since been addicted to roller-coasters.
Since then he's had 1,200 rides (not all naked!)
David Ellis is an Accountant by day, but a Nude Roller Coaster Rider at night! Unlike Superman he takes his clothes off and there's nothing underneath.
It's been up and down and side to side but he is a five-time Guinness World Record Holder for his naked exploits and he told Muireann all about it.
He's even featured in The Guardian:
The most important question of course being,
"What's the craic with bum sweat!?"
Here's David and the rest of his naked crew breaking the record for most naked people on a roller-coaster.
They recently shivered their way into the Guinness Book Of Records by getting 195 naked bodies on to the Grand National wooden roller coaster at Blackpool Pleasure Beach in England.