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- The USPS outlawed the mailing of construction materials after a man building a house in Alaska found it was cheapest to send every brick by U.S. mail.

- Throughout UPS's 103 years in business, the company has encountered several attempts by civilians to ship themselves­—all unsuccessful.

- FedEx's custom black-and-white-painted Panda Express planes have shuttled multiple bears back and forth from Chinese to American zoos.

- Scorpions are the only poisonous critters shippable by USPS; they must be for research and clearly labeled "live scorpions."

- UPS has an ocean shipping service that makes it possible to deliver, for instance, a beluga whale to an aquarium.

- UPS will not ship human body parts, but FedEx and USPS will—for legit medical purposes.

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