The lab coat might hide your shame, but nothing hides those blue hands for the next week! Trypan blue is that sneaky little dye biologists use to stain dead cells, but it's equally effective at staining lab benches, fingers, and dignity. Spill it once and suddenly you're walking around looking like you high-fived a Smurf. The best part? Telling everyone "No, I'm not sad, just careless with vital stains" while secretly wondering if your PI will notice before the next lab meeting. Bonus points if you accidentally touch your face and walk around with a blue nose like some sort of scientifically-accurate Rudolph.