An interesting thing I accidentally discovered is skipping the death barrier completely via the bed. Might be multiplayer only but thought it would be worthwhile bringing it up.

Afterwards, I walked briefly (no longer than 500ms) and I teleported back into the ship.

This seemed to be produced from a few things:

1. The rotation of the bed
2. The "rising" effect gathered from being pushed into the wall from the bed (although I am unsure of how I rose in the first place)
3. The replacement of the bed forcing me out of the ceiling. (My friend placed it closer to the wall, hence under my feet)

The rotation of the bed may have constantly vectored me into the wall, along with a coincidentally timed jump caused constant upward and outward (towards the wall and ceiling) forces that resulting me being stuck on the ceiling. There are two theories I have following that:

1. After the bed was replaced, I built up enough speed so that after I was clipped out-of-bounds, I was launched past the teleportation barrier and into that place. (Think Mario 64 building up sliding speed with BLJs)
2. The bed being replaced in the right spot and way caused me to clip out-of-bounds with nothing further on that.

This is only a guess of how it happened, but I have not attempted to recreate it. This would probably require external tools to view things like speed, map boundaries and other things way out of my knowledge. It is also worth noting this was performed using the MoreCompany mod v1.1.0 (NOT the most recent update) although with only 3 people in the lobby.

Hope this may be of some help.