icon = 'tiles.dmi'
icon_state = "missile"
density = 1
for(var/obj/Q in block(locate(O.x-1,O.y+1,O.z),locate(O.x+1,O.y-1,O.z)))
del(Q) //This is line 963, as referred to in the runtime error.
It'll delete the object it bumps, but nothing around it.
runtime error: bad del
proc name: Bump (/obj/rocket/Bump)
source file: Vehicles.dm,963
src: the rocket (/obj/rocket)
the rocket (/obj/rocket): Bump(Box (/obj/Box))