I did a trip from my space station in orbit around the Moon back to Earth on Monday night. A simple Delta-G IMFD scenario, which I find can be a good way to relax.
Entered into the atmosphere and realized my radiator was still open! Thought I got it shut in the nick of time, but everything went sour anyway. Death to all occupants.
I'd made the entire trip with the nose cone open! In external view I saw this only a split second before the entry became totally terminal.
It was not the relaxing experience I'd been looking for.