A video shows a motorcyclist visibly angry and arguing with a driver in a gray car. Deputies say it happened around 5 p.m. near the intersection of Beneva Road and Riviera Drive.A witness told News Channel 8 the driver threw spare change at the motorcyclist, Darin Hendrickson.The car then careens over and slams into Hendrickson, leaving him tumbling into the sidewalk in the middle of traffic. The car then sped off.