Aw you are not an idiot - we all do silly things every once in a while.
Here's a story about me to make you feel better, which takes place a couple of years ago.
There was a mini blizzard happening, but my cupboard was completely bare so i decided to brave the elements, bundle up my 4 yo daughter, sweep off my van and go shopping - but first a quick stop to the bank to stock up on some funds. We get back to the by now snow covered van, and I discover that the lock is frozen shut, and after trying the other door locks which were all frozen as well and giving the tires a kick - just because, we back track and hit a dollar store near by, and I ask if they have lock de-icers - which they didn't, but after I explained my plight the helpful clerk suggested a cigarette lighter to heat my key. I think that's a dandy idea, so I bought one and then schlepped my daughter back to the van and begin to flic my bic - as it were. Unfortunately the lighter was completely defective and wouldn't even emit a ghost of a spark, so we battled the snow once more and went back to the store, where I told the same clerk that there was something wrong with the lighter. She calmly took it from me, removed the child proof "lock" on it and produced a lovely flame.
Oh.
So I dragged my daughter back to the van - attempted the bic flicking thing again- with no more success than the first time. Extremely frustrated and too humiliated to bother the clerk again, I decided to go to a nearby drug store to buy a new lighter. When I made my request I was told rather snootily, that "drugstores do not sell smoking paraphernalia."
*sob*
I told the fellow that I don't smoke and I actually had a lighter but I was completely unable to remove the child proof mechanism to get it to work which I needed so that I could heat the key, to melt the lock, to get into my bloody van.
*sob some more*
He then took it from me and with a graceful touch, produced a lovely flame. I very carefully took note on how he did so, ran back to the van, daughter in tow, just in time to see the meter lady about to write me a ticket. It's a small town, I knew her so I blurted out my tale of woe and she sympathized (and didn't write the ticket) and watched as I flicked the lighter, heated my key and then was about to insert the now, very hot key into the lock. She then said in a puzzled voice "but isn't that your van - over there?" pointing to another snow covered heap one meter away.
EH????
Yep, you guessed it, I was attempting to get into (and kicking tires) of some one else's van for the better part of an hour. The worst thing was, 1 minute later, the rightful owner strolled up, inserted a perfectly fitting key into the lock and drove away.
The only bright spot was that I was now the proud owner of a brand new child proof lighter - so that I wouldn't accidently set myself on fire.
There now, don't you feel better?