Dragging or not, I guess some riders forgot that concrete's a lifestopper. Don't hit walls! 
(08-10) 07:58 PDT OAKLAND, CA -- Two people are dead and two others are in the hospital after crashing their motorcycles into a concrete wall on Middle Harbor Road last night during what Oakland police believe was a drag race. The crash occurred around 10:52 p.m., police said. Officers were dispatched to 3rd Street and Adeline Street, and found that four motorcyclists had hit a wall. A 23-year-old El Sobrante resident and 23-year-old Martinez resident were pronounced dead at the scene, police said. Their names have not yet been released.
The other two motorcyclists were taken to Highland Hospital and are in stable condition, police said.
http://sfgate.com/cgi-bin/article.cgi?f=/c/a/2007/08/10/BAG54RGHJ94.DTL&tsp=1
(08-10) 07:58 PDT OAKLAND, CA -- Two people are dead and two others are in the hospital after crashing their motorcycles into a concrete wall on Middle Harbor Road last night during what Oakland police believe was a drag race. The crash occurred around 10:52 p.m., police said. Officers were dispatched to 3rd Street and Adeline Street, and found that four motorcyclists had hit a wall. A 23-year-old El Sobrante resident and 23-year-old Martinez resident were pronounced dead at the scene, police said. Their names have not yet been released.
The other two motorcyclists were taken to Highland Hospital and are in stable condition, police said.
http://sfgate.com/cgi-bin/article.cgi?f=/c/a/2007/08/10/BAG54RGHJ94.DTL&tsp=1