My companions and I are spending the night in a castle allegedly haunted by a vampire. Swarms of rats are sent to harass us, but somehow I sleep through it, mistaking the swarm for my bnkets having a surprise built in heating and massage function as the thousands of tiny feet scamper over my sleeping form.
I only realize that there were any rats when in the morning I find that I had rolled over in my sleep, trapping one of the rats beneath my arm. I release said rat and it mistakes me for some manner of capricious-yet-merciful fey lord and spreads the word of my having spared it.
I find that my companions fared far worse during the night, as they are now in various states of fear and disgust over what happened. Some bear injuries from having fought against the swarm. I confess that I have concerns about how hygienic the whole ordeal was.
Once we finally track down the vampire the next night he once more unleashes a swarm of rats upon us. The murine sea parts harmlessly around me; repayment for my act of mercy.