Last year when riding Cuyama, I went too close to a manzanita bush and sliced my Irrideon tights wide open. It was like they were cut with scissors, but I didn't have a scratch on me.
I was just worried that the sight of my blinding white thigh might spook someone's horse!
Fortunately, the mid-vet check was back in camp so I could change into a pair of Kerrits that are a heck of a lot tougher than the Irrideons.