The giant boxing glove launcher in action in 1991.
The giant boxing glove launcher was an invention that Doc Brown had installed by 1991 to launch the DeLorean Time Machine, from an idle position, over a ramp and into the air.
The DeLorean still operated in the same manner, despite the new launch ability, as the car's engine still had to be used to increase the speed to 88 miles per hour to reach temporal displacement.