The following story occurred years ago when I was in Seminary.
We arrived back in seminary at midnight after a big trip. We went to Yam Hamelech, Ein Gedi etc.. Most of the girls went straight back into the dorm, while some girls stayed outside unpacking the busses. The busses were unpacked so they left. A bunch of girls stayed outside to schmooze.
Meanwhile a crowd gathered as there was no action on the little quiet street. They made everyone were still outside step back and asked them if they know whose bag it was. The girls ran inside the school yelling did anyone leave a bag outside?