A video of a squirrel the Internet has dubbed “Tippy the Fainting Squirrel” has gone viral a week after it was uploaded to YouTube.

The short clip depicts a squirrel eating acorns, but then the critter suddenly freezes and tips over. After a few seconds, he gets back up and starts snacking again — until he tips over again. And again.

It’s unclear what triggers Tippy’s fainting spells, but the Internet has provided a variety of theories.

Some viewers suspect the squirrel consumed fermented fruit, causing drunkenness. Others have suggested Tippy could have a neurological disorder, a form of myotonia or even parasitic worms. Everyone seems to have a diagnosis — and you can add yours to the comments — but this is a tough nut to crack.

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