I was waiting in a casino in Illinois for my husband who went into the mens room. I stood in one place so he would see me on his way out. Feeling silly I stared at the floor, where I saw a $5 bill. The man in front of me saw it too as he tried to kick it with his feet. It fluttered up and behind him, but he kept on going. As I bent to pick it up I saw it had magically turned into a $50. My first impulse was to hold it up and ask if anyone lost it-but I bet a lot of people suddenly would have realized they had lost a $50. Hubby came out and I said lets go now, holding that $50 in my hand. I would have felt like a thief if we had stayed. My question is this-is there a rule on these matters and WOULD YOU HAVE KEPT IT TOO?