I have literally cried laughing at this thread, particularly the unintentional typos!
To share a couple of my own horrors (having namechanged of course!):
Third first date with hot guy, we end up in bed, shagging enthusiastically.
I had started a period about 3 days previously. My periods are a bit mad, often very heavy but can last anything from 4 to 14 days. This time it had finished the morning of the date. Or so I thought...(you can see where this is going can't you)
While we were having sex, I did think it felt wet down there, but as it had been a while I assumed I'd just forgotten what was normal 
In fact I had bled copiously. Everywhere. We were both covered from the waist down, my bed looked like a crime scene.
All credit to him, he was entirely unfazed (though I was mortified) and claimed it was a massive turn on and went down on me to prove it. Then we both had a shower, changed the bed and did it again - with much the same outcome.
One that happened to me only this week:
We have a loo at work with 4 cubicles. I normally avoid one of them because the loo in it is a bit dodgy and doesn't always flush properly. A few days ago I went racing in there rather desperate for a poo. All the other cubicles were occupied except the dodgy one, so had to go in. Poo done - thankfully without noise or significant odour - I flush.
The bowl fills. Water comes up to the brim, and then subsides.
Poo has not moved.
I flush again. And again. And again. And the fucker does not move an inch. I start to think I'm going to have to put my hand in and fish it out, or cover it with loo paper and sneak out.
In the end, after 10 flushes it finally retreated.