Have you seen my keys?
Some things in life are inexplicable. This is a prime example of that in action. I could not imagine looking all over the place for my keys only to realize that they are in my tire. How did I even get to the mechanic? So many questions, so little time. This person must have been relieved once they found their keys, and a little shocked.
Do you think this person was going around their house trying to retract their steps only to discover their main set of keys were the very reason they needed their tire plugged? Sigh, big sigh. The only upside is that this is something that could never happen twice.