It’s something you see in movies all the time — something bumps the shelves in a store and down they go in series, like huge dominoes. Luckily, it doesn’t happen in real life because the outcome could be deadly.

That’s the lesson to be learned from an incident inside a Boca Raton, FL, Party City store, where at least three people were injured after seven aisles of store shelves collapsed this morning.

WPTV reports that the three people suffered only minor injuries. Firefighters and sheriff’s office personnel did a search with rescue dogs to see if anyone was trapped in the calamity, but thankfully no one else was caught among the downed shelves and the resulting avalanche of party products.

As of now, there is no explanation for what caused the shelves to collapse.

“We’re looking into the situation to pinpoint the exact cause, and the store remains closed at this time,” says Party City in a statement.

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