Hi Monroville, the main thing that annoys me about Alien is the scene with the decapitated Ash. The jump cuts between Ian and the dummy head need fixed and when the skin is being burnt off by the flamethrower the final blast of flames blows off the last of the skin revealing the white plastic looking mannequin head, no eye sockets, skull, nothing.
I'll have to check it again, maybe the last blast of flame could be cut before the plastic head was revealed.
J