When FedEx stopped trading its stock for a few minutes on Canada ArchivesWednesday, eyebrows immediately raised.

Company stock can stop trading for a variety of reasons, but one big one immediately came to mind: FedEx had been acquired.

And not acquired by just anyone. What if it was Amazon adding another piece to its growing global reach?

Turns out, Amazon wasn't buying FedEx. The delivery company instead was suffering from an information systems virus that affected its deliveries through TNT Express and its communication systems.

But you can't blame everyone for being on edge. After Amazon bought Whole Foods, an Amazon acquisition of an actual major shipping company seems totally believable.

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It was a fun 20 minutes for people watching Amazon's every move. (And people who care about FedEx, I guess.) Next time FedEx halts trading, maybe it'll be more than a cyberattack.