If something on facebook gets 50 comments, no matter what it is, the person who posts the 50th comment gets a slap from anyone else who had already commented.
(on a photo)
1- you look nice
2- amazing babes
49- And that is how we solve global warming
50- you raise a valid point but how can the goverment pay for that?
51- 50TH COMMENT! YOU GET A SLAAAPPP! 50 comment slap !