Some times I really wonder if this works... I'll use it any way...

WARNING:

This video contains scenes that, just may not, encourage viewers to  participate in Parkour, which is by NO MEANS jumping rooftops. Parkour is a sport of overcoming obstacles as fluently as possible. If a roof gap is too big an obstacle for you, make sure you do not go near any of them.

I have to say though this person did a very long gap, a cat leap would've made it there... Respect to him, or her (What...? C'mon, you never know what girls get up to these days...) who tried it.