Crewman who threw a sledgehammer suspended

From yahoo sports:

After Harvick and Dillon crashed late in the race, Harvick — who currently drives for RCR in the Sprint Cup Series — stopped in Dillon’s pit box out of frustration. Dillon’s crew angrily confronted Harvick to get him out of the way and a sledgehammer came out of nowhere from the direction of the pit box.

Guess they figured out where “nowhere” was, and his name is Adam Brown.