Sleep Talking and Walking

I woke up last night because my wife was talking to me. She was actually sleep talking. "It's spilt everywhere," she said. Since I was now awake I thought I'd entertain myself. "What spilt?" I asked. I find that I have to be careful how I talk to her when she's sleep talking because if she hears me laughing then she wakes up and stops talking. "The mouthwash," she said. "Where?" I queried. "All over the floor." I then said: "I've already cleaned it up."
"Thank you," she said and then there was silence.

Of course when questioned about the conversation in the morning she remembered nothing about it.

A friend's father told me that when he was at boarding school they used to tie his leg to the bed post to prevent him from sleep walking. This had adverse consequences when the fire alarm went off in the middle of the night and everyone jumped out of bed and ran downstairs. Apparently he broke his nose on the floor.