In the tank, my body bobbed in space. I couldn't tell where my limbs ended and the water began. Were my eyes open or closed? Was I drifting from side to side? After a while, I decided it didn't matter. I was floating.
"It's sensory deprivation, but in a good way," said Allison Walton, co-owner of FLOAT, Floatation Center-Art Gallery in Oakland.