Ha! That's pretty funny gc505, and I think I can believe it too. I heard the guys in my area one day at the end of surveillance operation, made sure everyone involved copy that they were leaving, and then relayed a story among themselves about how now they make double sure everybody has checked out because a couple of years ago one of their buddies didn't hear the message and got left at the target for quite a long while, none the wiser.
The way you state that gc505, makes me think it has happened, at least once before.