The Libyan gunman readies the RPG.
A rocket-propelled grenade was used by the Libyan terrorists to try and kill Marty McFly with at Twin Pines Mall in 1985.
The terrorist gunner retrieved the RPG and never got to blow the DeLorean time machine and Marty with it up, because Marty inadvertently accelerated to 88, thus getting sent to the Peabody farm in 1955.