So this happened in the movie:

The Alien beach ball lured this guy to the ship’s lone elevator shaft, pushed up against him in a humping fashion to get him to fall. He didn’t. So the the alien did this:

It tried to *tickle* him into letting go and falling to his doom. I am not making this up. When that didn’t work the alien left the crewmember to get squished by the elevator:

He wasn’t squished.