Not precisely the same thing, but back in January of last year - coming out of medically induced coma, from some time Thursday until Friday afternoon when I became lucid - every breakthrough into consciousness treated me to what I recall as - as best I can describe - giant neon spiders. My perception was so whacked that I could swear I had been moved to a different room. I don't really trust my recollection, much less my perception.. 
Wild wacky stuff, perception.
Wild wacky stuff, perception.
