What was it like? Did you experience mystical visions or profound boredom?
No, but I watched about 30 minutes of Lost in Translation once… does that count? 
I did have a disembodied feeling at first, which was a bit eerie. But soon I realized that was because the temperature of the water was just right and I was motionless. Just moving an arm or leg moved the hairs on my limbs and made me aware of them again.
Interesting, but nothing cosmic.