Sorry for the large amount of cussing but I was just TOTALLY freaked out. I walked into my bathroom not 30 seconds ago... and my water turned on right in from of my eyes. I had to turn the no b off, and it turned on RIGHT IN FRONT OF MY EYES. The knob moved and everything :|
Hmm, that's interesting. I can see the toilet leaking because mine does that. All the time. I really don't know of to explain that except a pressure leak. If this is happening to your sink, multiple times, you might want to think about calling a plumber and seeing if you can get it fixed.
He may also have to consider getting a high priest to bless his bathroom.