I know the opening sequence was briefly touched on, but Stallone literally fires randomly into the side of the truck to prove it contains gas right after the man on top of it has confirmed, by checking, that it does in fact contain gas. Hidden drug compartment or not there is no way Stallone could have known that he wasn't shooting into the flammable part of the metal gas tank. Also had he actually killed the driver, how does he know the truck would stop on time? At no point does he imply he plans to move. The opening sequence is obviously cliche eighties action fodder, but still...