I create my own bathroom nightmares.
In Grand Cayman, I went into the bathroom and didn't notice the row of urinals on my way in. I had to spend 15 minutes in the stall until all the boys left so I could escape.
In Aruba at the airport, when I flushed, the whole toilet fell over.
If I remember correctly, when visiting Ephesusian (made up word) bathrooms in Turkey, you have to pay for the toilet paper on the way in.