This happened some time ago. I was working at a ski resort.
I went out with a girl who was also working there a couple of times, slept in her bed but we didn't fuck.
Next time I saw her she flat out ignored me, in fact she did her best to totally avoid me from then on.
I didn't know why.
A few weeks later I had a dream, whcih was mostly normal (hence forgettable) until she appeared at the end.
I tried to (dream)talk to her, just being friendly, and she screamed "GET AWAY FROM ME!" and shrieked.
That did my head in.