I guess Marjoe Gortner's character was never in the Marines. In that one picture, at the angle he fires that gun, it looks like he'd hit the brick chimney, instead of the rat.
Maybe I should have stuck with the film all the way through, but I found it so bad, and not in a good way, I turned off the television, before the film was over.
I forget what movie it was, but a stage hand held a stick or something so the actors would know where the special effects monster was.