Back in the first days of keyless start, I got rental with it. The first thing I did when picking up a rental is stop at the local home depot and cut the wire the use to keep all the keys and fobs and the huge plastic tag together, so I can just put one key and remote in my pocket. I also kept one of those split rings in my bag in case I needed one. The rest of the crap went into my bag until it was time to return the vehicle. I used to travel a lot, btw, sometimes flying to two or more different cities a week.
One night I'd just done that, and needed to go into a different store, so after putting the remaining junk in my bag, which was in the trunk, I tried to close it, and it popped open. I did that over and over, thinking "great, going to have to go back to the rental company" until I realized it had worked when I first put the bag in. So I pulled it out, and it closed fine. Put it back in, wouldn't close. VERY CLEVER!!!
So I tried to put the spared in the glove box. Nope, couldn't lock it!!!
So I put the second remote/fob in my other pocket, locked the car, and walked away laughing..