Further proof that the USPS has a collective institutional sense of humour:

[theweaselking]

USPS packing guidelines for how to ship a hippo.

Comments

[cmseward.livejournal.com]

The sense of humour helps when you're under constant threat of assault weapons.

[cahms.livejournal.com]

I wonder if the fact that they included it means that enough people have asked the question. That would be a little disturbing.