You'd think the monster would make gravity "fall" towards the elevator entrance so it could chase them faster at the end, but instead it just made it along the doors to run sideways? Interesting choice that suggests the monster is actually quite fragile and would die from a short fall. It also is interesting that it seems to usually "trap" food through a fall to their deaths, implying the monster isn't that capable of killing them by itself. It's quite possible this is one of the weaker monsters that have shown up so far, as long as you kill it without being bashed to death by gravity switches. An annihilate mob of the otters probably could take it out.