Pretty much what the title says. Was gonna join the discord to show this (https://imgur.com/a/RlhiAa9) but its needs updating :D

TLDR you can press space twice on the right corner of the workbench by the automatically opening door before the particle accelerator and itll launch you up into the rafters where zombies cant hit you or even throw anything at you.

The Discord link should be working now.

The discord invite is out of date again.

alright give it a go now, ive made it a permanent link.