It’s probably very politically incorrect, but I love this sig line copied from a colleague’s email:
Some people are like Slinkies… they’re not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.
Rhonda Bracey: At Random 
*laugh* I used to have that as a poster on my office wall.
I’ve emailed you the file for your amusement 😉