It was the guys in brown that lost an entire Mercian coming from Manhattan to me in LA. It was missing several days after it should have been delivered and I had to stop the rotation of the earth to get that package from wherever it was mis-directed. I had connections at UPS at the time and I really was never told the exact story. (package label was pristine, with a totally different tracking # than the seller provided and the box itself looked like
it had been through world war III. Very weird)
I sent a package to a customer in London UK one time via USPS that sat in some unknown post office in England.... for about 3 months. It was then unceremoniously returned to me in the US.
No explanation was given as to why it never made it to the customer, who was within 1 mile of the PO. I had a postal inspector (grandfather of one of my friends) check into that one.