Dreams are basically simulations of our lives that we run, sometimes with different physical constants, resulting in different worldly behaviours. Fever dreams (not necessarily during a fever) are when we are sweeping over a range of constants, so behaviour keeps on changing.
That could explain my dream about setting up a projector in a room with a poisonous atmosphere, where everyone except me has a space suit…
Which vault was that again?
It was a dream about my actual last job.