ZR1 Corvette Dyno Fail

I attended dyno day at Weapon X and they were dyno-ing a new 2019 ZR1 Corvette. Basically because of the street tires someone had to brush all the rocks off the tread so they didn't fly out. The guy who was doing it got a little careless and got the broom bristles stuck while the wheels were rolling and got dragged under the tire