Skydivers are insane

[giza]

 
But still, this is utterly cool:

From working with some skydivers in years past, it's also a pretty high risk maneuver. If one person screws up while the canopies are deployed and lines get tangled, then several people can wind up in near-freefall. Then you get the fun of pulling out a knife to cut any tangled lines and hope you can deploy your reserve chute in time...