I have encountered a minor glitch in the Self Bondage Room. I was able to replicate it following these steps:
1. Tie self up. Gag, crotchrope and arms.
2. Go to bed
3. Wake up from distraction
4. Try to go to bed again
The result is a black screen that blocks view of everything but HUD. You still have control of the character, can struggle, and theoretically move (though I can't see to confirm).