CELEBRATING GONE TOO FAR NASCAR / Fox Sports
Layne Riggs was so pumped over his first career NASCAR Truck Series win on Sunday ... he literally DISLOCATED HIS SHOULDER celebrating the dub!
The 22-year-old second-generation driver notched the victory at the Milwaukee Mile during the LiUNA! 175 -- the opening race of the Truck Series playoff.
After earning the big victory -- moving him to 12th in the standings -- Riggs pumped his fist into the air to celebrate his big moment.