I learned to double-check the track and field equipment the hard way when I went into a full jump onto the high jump mats after they were stored in a trailer all summer. I was pretty pleased with my form, but not that mice or rats had chewed out the foam from the center of the mats just about exactly where I was accustomed to landing.

I feel like it's a lesson I've carried with me ever since: never commit to action until you've seen something naked.