Teens filmed walking on top of 40-foot motorway cage

When I was a kid, I did some crazy stuff.

This, though, I never did.

See: Man causes massive explosion with his silly stunt

Watch this daring footage of two teenagers walking across a bridge about 40ft above a busy highway.

The footage shows the teens walking on top of the metal structure as cars drive underneath them. 

It's dangerous, it's stupid, and it'll leave you clinging onto your chair!