Daring and dangerous BMX stunt in America
15 January 2014 Last updated at 08:06 GMT
This is definitely NOT one to try at home!
Mat Olsen wowed onlookers with his stunt ride along the top of the Seventh Street bridge in Fort Worth in Texas in America.
He rode across the six arches luckily without falling off or getting hurt!
The 25 year old is a professional biker but police still gave him a warning for doing such a dangerous stunt.
Pictures from decoBMX