The PIT maneuver was adapted from the bump and run technique used in stock car racing, where a driver would bump a competitor in the rear bumper to cause the other car to lose traction and swerve away from the racing line. The PIT maneuver differs from the bump and run in that the car is bumped from the side near the rear wheel, causing the vehicle in front to spin out. It is illegal to perform this maneuver intentionally in stock car racing because it is very dangerous (although Rusty Wallace used this technique to spin out Darrell Waltrip and win the 1989 All-Star race). The high speed involved in auto racing makes it much easier for drivers to take out another car with a less substantial bump than at lower speeds. When employing the PIT maneuver, the speed of the two cars involved will determine how far the car will travel once it is bumped. Partially for this reason, the higher the speed, the more unpredictable and dangerous the PIT maneuver becomes. This is just one of the very important factors a police officer must consider before implementing the PIT maneuver. A police officer is trained to wait until conditions are right before attempting a PIT maneuver to avoid the use of deadly force. Speeds must be and the "landing site" for the bumped vehicle must be clear of danger.