>>3867875once, on a very crowded train after having had a very poor night's sleep and not having eaten anything for about 20 hours
there was a med student on the train, told me my tongue had gone white which apparently meant i had low blood sugar or something.
it was weird, my vision gradually went dark towards the edges, my hearing got worse, but i ignored it because that had never happened before. woke up a few seconds later to some guy holding me and splashing water on my face. the people said i had dropped my water bottle and then a second later collapsed (i was standing) and i guess the guy who was holding me caught me. someone gave me hard candy to suck on and a seat, very nice people.