SEE IT: A great white shark shocks diving tourists in South Australia by swimming on its back.

You don't see this every day. Or maybe ever.

A giant great white shark gave shark-diving tourists a rare treat when it was spotted swimming upside down off the coast of South Australia.

Diving company Calypso Star Charters posted the video to its Facebook page, noting this was the first time this type of incident had ever been seen in the area.

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"We do not see them do this very often at all, in fact it was the first time Captain Dave had seen it himself!" the company wrote in the Oct. 3 post.

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The footage was taken by one of the tour's customers, Wendy Bower-Leech.

Despite similarities, the shark in the video is not experiencing tonic immobility, a "trance-like state" where the shark is turned on its back and disoriented, akin to human hypnosis, according to Shark Trust.

The incredible video comes just days after another great white, a 17-foot behemoth named Bullet, was captured on film biting and shaking a shark-diving cage off the coast of Mexico.

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