I was fortunate enough to find this when I realized my mouse buttons didn't (and still don't) work in-game. It doesn't save any time in this area as it's quicker to kill this Xeno. It could be huge in later areas.

Back up next to a door. You'll need to wait for the Xeno grab into Pistol Whip, and you'll phase backwards through the door. Don't attack it at all.

You still get the Checkpoint when you proceed to the next area.

The bigger door after the video ends doesn't seem to work. It might with more testing.

I've not had a chance to test this on elevators, or other smaller doors yet.