Yeah, the chest-burster alien scene hasn't aged well at all. I think in hindsight they shouldn't have shown it running/skating across the table at all. They should have done it using sound similar to how Spielberg did it in Gremlins where all you see is a tail disappearing through a vent.

Alien is an amazing film though and I agree it just edges the second one for me. Aliens is an amazing film too.

Now this thread has made me want to play Alien:Isolation. It passed me by on its release.