One of the Deadpool actor's hobbies is taking long cross-country motorbike rides, and on one trip from Utah to Wyoming he decided to stop by the side of the road for a toilet break.

He hopped into a ravine so he could pee in private and found himself standing knee deep in a dead horse.

"There was this God awful stench," Ryan told U.S. late night host James Corden, "I realised as soon as I jumped in there, I jumped into a dead horse, like, up to my knees. I didn't even want to get rid of my pants, I wanted to go to a hospital and have my legs cut off!"

And he never did get to relieve himself: "I didn't pee!" he recalled. "You just suck it up and you step out. That changes you."