Dating horror stories?

After a particulary bad date (she talked about her ex for 3 hours!) it got me wondering, whats your worst dating story? irrelevent or funny.
Answer
Pulled a polish girl in colgne in germany, great night out, went back to her flat.....her sister was in the bed next to us and watched e hing in slilence that we did.and we did e thing. never spoke, just lay on her side and watched........bizarre.....it was like it was all perfectly normal...and yes i would have asked her .but it did not seem the thing to do on a first date.....also climbed out a fair few windows and fire exits in my time as husbands came home etc ...