Yep, keys somehow fell out of my shorts pocket onto the grass without me noticing, mowed over them without noticing. Only when I went to leave and found keys missing and after a quick search I found what remained of them. A couple of keys survived but of course my car key could not be found and of course I had no spare either.
Had to call a locksmith, broke into my car to remove the key barrel to make a new key, Luckily I eventually found the mangled plastic part of the car key which the locksmith could retrieve the coded chip otherwise would have been another $100 reprogramming a new chip. Nearly 3 hours wasted and $250 out of pocket wasn't the best day. I'll probably laugh about it one day but not today.
Lesson learnt- secure keys better and always have a spare!