It could be worse...it could be raining.
I was feeling really down and depressed after my one and only experience of LSD. Bad bad bad trip. Even the waccy baccy gave me flashbacks, so I had to quit that too. Anyway, just when I thought I couldn't get any lower, I remembered this scene in Young Frankenstein, where the good doctor (Gene Wilder) and his faithful assistant Igor (Marty Feldman) (who wore no makeup in this film) are hard at work. Dr F. laments the terrible predicament they find themselves in - knee deep in dirt, in a cemetery, at midnight, digging up a fresh corpse in order to reanimate it.
"It could be worse," chirps the ever-cheerful Igor.
"HOW??!!"
"It could be raining."
At which point there is a flash of lightning, a crash of thunder and the heavens open.
It brought me out of the doldrums then, and still makes me smile now.