SAN JOSE, CA - MARCH 10:  Rapper ASAP Rocky performs at San Jose State Event Center on March 10, 2012 in San Jose, California
C Flanigan

Have you ever seen a rapper wearing a big piece of jewelry and just wanted it? You just thought you would look really good in it? If you have, you can relate to the fan who stole A$AP Rocky's $15,000 Rolex at his show in London on Tuesday (June 5).

Unfortunately for the thieving fan, snatching Rocky's watch off his wrist really set the rapper off (the guy must have missed that story about A$AP's audience brawl at SXSW). In the video below, you can watch A$AP Rocky's crew rush into the crowd (around 2:00) before security turns the lights on (2:10) and A$AP Rocky encourages the crowd to beat up the dude who stole his watch. Check out the video, and then don't even think about stealing A$AP Rocky's watch ever again.