Part of my job as a medical courier is to pack some specimens in dry ice for shipment. We get our dry ice in blocks that need to be pulverized before going into a Styrofoam container. In the picture you can see a block of dry ice and the precision tool we use to pulverize the dry ice.
Scottsbluff, NE. I am pulverizing the dry ice. Sweet little old lady comes up to me and says, "Sir, I think it is already dead". She then smiles sweetly and goes on her way leaving me going, "Uh, uh .....". Bitch!