Sleeping in space. No oxygen? NO PROBLEM!

[mbc]

I'm pretty sure stuff like this is intentional. Any floor tile in space (including catwalks) will save you from burn damage. Sure, it doesn't make much sense, but it can lead to some pretty cool stuff (running across the catwalks with internals on to escape someone chasing you, building a line of flooring across a breach so you can bridge the gap, etc)