When I worked at Firestone, I left my ratchet, and 10mm deep in someone's trunk because "hurry hurry hurry!." It was a HF composite, and a HF 10mm, but they still cost more than doing the light for the customer made me. But you know, can't slow down! Things are different now, but I still try to get most jobs done quickly as I can.
I have left stuff in other people's bays, despite no one having an "assigned bay." I've had to reclaim some of "my" tools from other people, because they just put it in their boxes. I on the other hand return what I borrow, and bring back what I find. Some of the guys are more honest than others. Most stuff at work is issued, so there is little personal property wrapped up in our boxes.
One of my coworkers brought back my Snappy 9/16" flare/open end... because it took a trip down the road in the engine bay (MC job). I have to put stuff in and around the hood/bay/cowl... magnetic trays don't stick to aluminum and fiberglass skins. I try to get things back in their trays, on their clips, what have you, because I hate having to triple check on tools.
I've sent a couple vise grips, and a pair of diagonal cutters out in trailers, under the frame of trailers etc. That's one of several issues that can come with impatience, or an impatient boss.