Quote from Dwight K. Schrute in Casual Friday
Dwight K. Schrute: Fresh hot ink. Stanley: "New File System". Dwight K. Schrute: Trust me, Stanley, you're going to want to read this memo very carefully. Stanley: I am not changing the way I do my files. Dwight K. Schrute: No, no. This goes for all of you. Believe me, you are going to want to heat my words. [aside to camera:] Dwight K. Schrute: When held over heat the invisible ink will reveal that everyone should meet at the warehouse immediately. Do not ask me where I got the invisible ink. Urine. It was urine.