A couple months ago a friend of mine was leaving to meet someone that she had been talking to online. So the day she left, we went and bought her a "kit" that included body butter, motion lotion, love dice and the like. Since she was leaving straight from work we waited to give it to her at the end of the day, so she had to take it with her. What we didn't tell her was that while her bags were stored in my bosses office we took a "personal massager" and wrapped it in tin foil and put it in her carry-on bag.
She was sooo pissed off at us. It was great...