I had no idea you played the piano roachboy.
I agree that playing it definately changes the way you think. There have been studies that suggest music (mainly classical) can create a stronger communication between the two hemispheres of the brain. After I practice a piece for awhile I've noticed that I don't think about the specific keys I'm striking, but my hands move almost by themselves with me observing the entirety of my actions. Its seems natural to simply "do", but can be somewhat strange when being considered.
What you said about the glass falling, roachboy, is exactly the reason why a learned martial artist keeps (tries to; which is almost a contradiction) his mind empty during a fight. When an opening presents itself it is not you who strikes, but your body acting out of instinctual awareness and reflex.