well how i see it..is if the person gets depressed while they are under the influence then they have already been depressed from get go. and that smoking weed just makes you think alot about certain problems. or just think alot period.when i used to smoke thats how i was . I Kinda believe i was depressed due to dealing with deaths in family and other financial stipulations. and if i were high i'd think about it alot..especially death. like...i look at death in a whole different perspective now because of weed. but i quit because it was just too much for me to deal with.the shit had me going nutts.