Akon Sued for Stage Diving

A concert worker says he's physically disabled right now now now ... and it's all Akon's fault -- after the singer allegedly stage dove right on top of the guy, causing him permanent injury.

A man named Matthew Graham has filed a lawsuit against the singer, claiming he was working Akon's show at BayFest music festival in Alabama back in 2009 -- when Akon "negligently or wantonly leapt into the overcrowded mass of concertgoers" and struck him