Sunday: Found!

You're walking along, minding your own business, and you see someone toss something into a trash can. It looks like something interesting. You go investigate. Finders keepers, right?

So... what is it, and what happens next?

Use the RP tag on your posts, and you're encouraged to jump into the other answers-- maybe as the person who threw away the original item! How do you feel about this person having your [X]??