In 2007 a skater named Tequila Mockingbird with Windy City Rollers' The Fury experienced a tragic injury during a game.  Her neck was broken resulting in permanent paralysis.  Several groups (derby and non-derby alike) came together to hold the Rockers & Rollers fundraiser / Halloween bash on October 27, 2007 to both party it up and raise money for her medical care.  The Rockers & Rollers patch was sold exclusively at the event.  Like all 2007 patches, it's extremely rare and I'm beyond fortunate that I managed to acquire one.  The odd shapes above and behind the roller skate are crankshafts and pistons, most likely a nod that one of the major sponsors of the event was a motorcycle group.