What is the difference between a Mercedes and a Ford?
Princess Diana wouldn't be caught dead in a Ford.

What is the difference between Princess Diana and Thomas the Tank Engine?
Thomas made it through the tunnel.

What is the difference between Princess Diana and Casper?
Casper can go through walls.

Did you hear that Princess Diana was on the radio?
Yeah she was also on the window, the seats,...

What is the difference between Princess Diana and Tiger Woods.
Tiger Woods had a better driver.

What is the difference between Princess Diana and a blade of grass?
About six feet

What does Princess Diana and cell phones have in common?
They both die in tunnels.