I gotta agree with Seaweb and here's why.
It's 3:00am The phone rings You are half asleep standing over the bowl, trying to not fall asleep at the wheel, so to speak. You nod off, just for a second. Just long enough to miss the bowl for a few seconds and make a puddle. Unaware of the piddle puddle, you trudge back to bed. Your movement has wakened the wife. Now pissed, she also has the urge to go. She does, and in doing so, slips in the afore mentioned puddle and hits her head on the sink, killing her.