(NEWSER) – A man in England who ordered a waterproof Kindle was surprised to open his FedEx package and see a tumor specimen instead—delivered all the way from California, no less. "When I opened it I had quite a shock," recipient James Potten tells the BBC.

"My name was on the outside, but the contents weren't what I expected." The Bristol resident tweeted FedEx about the error on Saturday with the hashtag "#FedExFail" ("You've swapped my new kindle with a tumor specimen") and told them about it several times, the Bristol Post reports, but was repeatedly informed by customer service that he had received a Kindle. He still refused to actually open the parcel, which was marked "non-infectious human tumor tissue." As Potten puts it, "Presumably this is a very important package, that needs to get to the hospital as soon as possible."

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