 Here is a commercial for Fedex featuring cave men and dinosaurs. The one cave man puts his package on a flying dinosaur and sends it off. The problem is a T-Rex eats the flying dinosaur and the message. So the cave man goes back to the cave man boss and tells him the package didn't back it. The boss asks him if he used Fedex (which he didn't) and then tells him he's fired. The cave man can't believe it because Fedex 'doesn't exist yet'. He stomps off out of the cave where he gets crushed by a giant dinosaur.
Check out the cave man Fedex commercial below or click over and view it on the host site. Source: Google Video | 
