You know that moment when your brain communicates that you've made a terrible decision? It probably happens at the moment when you look down during a rooftop jump. 

Now, being the sensible folks that we are and never having worked as a professional stuntperson, we haven't experienced that, but this video, shot by stuntman Ethan Swanson in Chicago, is the closest we'll ever come.

It's a jaw dropping clip, filmed using two GoPro cameras, that gives you a first-hand look at what it must be like to fly between the rooftops.

We can pinpoint the exact moment where we would have needed new underwear, and it's the bit where he lands on the far side of the slanted roof and flies off towards the stairs. Still, looks like there's not a bother on him, the mad yoke.