I’m a paramedic. The last time I used a tourniquet was on a teenager that put arms through a window. Their sibling locked them out of the house, so they were trying to force their way back in.

It’s uncommon, but things like that happens more often than you think. Plate glass and any sort of powered (and to a lesser degree: unpowered) cutting tool are probably the worst offenders.

Though if you’re going to carry a tourniquet make sure you’re trained on how and when to use it properly.