Let’s put together some relevant facts for the sake of reason. The speed limit was 30 MPH, which suggests really high speeds might be difficult to attain on a small community road. The apartment received no major interior or structural damage. It also seems insanely improbably that small landscaping rocks would cause a car to receive more than a few feet of lift. Ergo, the current official explanation is a bit difficult to stomach.

As chief curator Claude d'Anthenaise explains, it's an experimental museum that likes to baffle the visitor. "I wanted to create a museum where the visitor would feel constantly disconcerted and lose his bearings – just like someone walking in nature," he says. "In a wild setting, you're confronted with all sorts of things you don't understand. You're not on your own territory."

So "totally insignificant, even repulsive" objects have been deliberately placed alongside art of the highest quality. Visitors often have to search out explanations for displays. There are hoaxes, traps and false leads. For example, a fake appeau – a device used to imitate the sounds of animals – is presented in what looks like a serious, scientific collection.

"In the hunting trophy collection, there's an animal that is actually an artistic creation. It's like a wild boar's head, which is completely imagined but plausible, all white, and it follows the visitors with its eyes. We can even make it talk as they pass. Sometimes the security guard will turn it on.

"Suddenly the visitor is confronted by this animal which is not fully dead. It invites him to challenge the entirety of the collection. He says to himself, 'if this is an invention, maybe other things are too'. So he observes them differently.