Many years ago I'm pretty sure there was a minor fad for sensory deprivation tanks. The idea was you got into a soundproof and lightproof tank, floated in viscous liquid the temperature of your own body and, deprived of sensory input, you had spiritual visions, or something cool happened, you know, like dreaming. I think there was a movie about it called Altered States. Then later the concept sort of developed into The Matrix, starring Keanu Reeves. The Matrix took a darker view of floating around, sensory deprived in viscous liquid, but it also presented some more exciting possibilities.
Why am I telling you about real and imagined sensory deprivation tanks? Ah, well, with a serious back injury, lying about day after day doing very little for myself but trying to be somewhat comfortable, it's all a little like a big sensory deprivation tank. I float and float and float. Am I having hallucinations, lucid dreams, visions?
No, it's more like The Matrix, I reach out to the Internet with my mind!