i lost my vision durring a massive panic attack once... just kinda faded out... like you ever fainted (namely from blood loss, or almost fainted from blood loss) it was exactly like that, but i never lost conscienceness..... i was completely awake, and aware... i just coudln't see, my vision was totally black.... i had to feel my way around, i felt my way to a corner and sat the fuck down... my vision didn't come back for like 10-20 mins...

it was obvious something was going on too.. i was drenched in sweat.. it literally looked liek i jumped in a pool with my clothes on... i was also really fucking white, like WHITE WHITE.... sheet white.... paper white... and shaking like i jumped in a fishing hole in alaska...

ok so... i looked like someone who poured 3 gallons of white paint on themselves, and jumped in through a fishing hole in alaska and crawled back out....