Amusing tidbits you pick up in the mailing industry...
No, you can't mail running chainsaws. At least I'm pretty sure about that; I don't know a specific regulation against them, but USPS takes a dim view of anything that puts its employees and machinery at risk.
On the other hand, you can mail live scorpions if you package them appropriately. Note that, however, that this is limited to the US; apparently doing so in Australia is not a good idea. The same page also gives the rules for mailing baby chicks (which must be not more than 24 hours old) as well as adult chickens (Express Mail only, please; and no refund if the chicken dies in transit unless the container was damaged).
Comment byat 6:59 PM:
Really silly rules. Where is that page ?