Because I just saw the best Fed Ex commercial ever!

Caveman ties bone to Pterodactyl. It flies away and gets eaten by a T-Rex.

Caveman goes back to cave, tells Caveboss the package didn't go through. Caveboss says (captioned) "Did you use FedEx?"

Caveman says "No."

Caveboss says "then you're fired"

Caveman says "but FedEx doesn't exist yet!"

Caveboss says "Not my problem"

Cave man stalks out of caveoffice, kicks smallish dinosaur and is stepped on by giant dinosaurelephant leg.

Best commercial ever!

(ps... I work for Caveboss.)