Damn Cloudfare errors, tried to reply for hours yesterday…
Question 1: The difficulty in the setup is getting the door out fast, it gets blown in and it lands flat on the floor and because it’s surprisingly same width as the doorway, it has a tendency to get stuck and then falling of your hands, and once you grab it again and get it out, it’s usually oriented in an awkward angle + there are 5 enemies outside, 2 of them next to the doorway which might be better to get disposed of.
The method I might use is shoot the first guy in doorway as he rushes in, pull door (hopefully) through, shoot second guy in corner, grab door and put it in it’s place (throw and hope for best?). So if all goes well, it shouldn’t take longer than some seconds. Alternate method could be using a table, it’s much faster to get it out of the door as you can throw it straight through before shooting anyone.
This is also afaik the first place where you can get the shotgun, it’s on a box above on some pipes and just shooting the box usually causes it to drop down.
Question 2: Not only possible, but easy, there’s some water puddles (google translate) to break your fall on, I lost my focus because I was so surprised to make it up there and didn’t know what to do next