A guy that normally does pranks on YouTube decided to change the type of video he posts.  He decided to give a homeless guy a lottery tickets, and told him that it's a winner...which it wasn't.  He set it up so the cashier was in on the bit too, so when the homeless guy gave him the ticket, he would tell him it's a winner.  

The homeless guy breaks down into tears, and the video is pretty awesome.  Warning...you may cry over this thing!