If you look near the end he's spraying blood all over the ground. His arm was seriously screwed up.
FOR THE LOVE OF ALL THINGS THAT ARE GOOD AND JUST IN THIS WORLD, IT FUCKING RIPPED HIS SHIRT OFF!
he had a knife and tried to slash the tire... the pressure on these type of tires is way too much to just simply slash with a knife so when it popped the knife was jammed into his arm hah hah hah karma indeed
Also, His arm flesh was ripped off, he lost his arm.
Looks like he cut the tire, Dumb person, meet Karma.