Several years ago while on a business trip to Chicago I tripped on a subway grate on State Street. My hand was torn up, glasses went in one direction, watch in another, and wallet flew out of my pocket and went in a third direction. A homeless guy helped me up, retrieved my glasses, watch, and wallet, and made sure I could walk over to Walgreens where I could get first aid supplies. I had no money. I got money at Walgreens but didn't see the guy when I walked past. Later in the morning I saw him and gave him some cash (can't remember whether it was $20 or $50). He didn't want to take it, but I insisted.