during Day Four of the UCI Track Cycling World Championships at Lee Valley Velopark Velodrome on March 5, 2016 in London, England.

This injury is so bad it makes Jason Pierre Paul’s mangled finger look like a paper cut

This cycling injury is bad. And THIS is your warning!

RELATED: JPP decides to share pictures of his mangled hand.

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Apparently the cycling world has introduced some new technology called "disc brakes" that are causing quite the stir, but for all the wrong reasons.

220px-BrakeDiskVR

During the Paris-Roubai, several crashes took place but that's not the real story as crashes happen quite often in cycling.

The story is what those disc brakes did to one of the cyclists unfortunate enough to have crashed. He hadn't been using the tech, but was following a cyclist who was and when he fell into him, this is what happened to his knee:

That makes JPP getting his finger blown off look tame.

If you need to regain your composure, go for it.

[h/t Deadspin]