Here’s something that’ll blow your mind (sorry that it’s an ad): stare at the colored dots on this girl’s nose for 30 seconds, then quickly look at a white wall or ceiling (or anything pure white) and start blinking rapidly. Congratulations, you just processed a negative with your brain!

(via eject via Rob Sheridan)

P.S. Next time you’re in the photo lab, try doing this trick with your loupe and lightbox to save yourself some test prints.