I thought, I'll just dawn this expensive wind breaker I bought, it'll work fine. Did it work? Did it balls. I served as bath for my nipples and a shower for me bollox. I've literally never been wetter.
I once ran through a bad thunderstorm during a zombie marathon and ended up being an emergency medic for all the people with sprains/cramps. A really wet and cold medic. I thought a jacket would keep me safe but no haha