(Note: I am working the ticket counter giving out prizes. A guy and his teenage daughter are examining a glass display case with stuff inside. Suddenly, the daughter backs up a foot and launches herself directly into the case, almost knocking it over.)

Me: “Please do NOT push on the glass!”

Father: *angrily* “Well, there should be a sign or something! How was she supposed to know that would happen?!”

Me: “I’m sorry, sir, but people don’t generally throw themselves in to our GLASS cases.”

Father: “Well, there should be a sign! Geeze!” *storms out*