San Francisco’s Majestic Collection art gallery accidentally left an inconspicuous shopper locked up when it closed on Tuesday night. A San Francisco Police Department dispatcher received a 911 call at 8:58 p.m. on September 16 from a man inside the store, claiming he was locked in, and that the front door of the Fisherman’s Wharf gallery had been chained shut, the New York Daily News reports.

“It appears that this person was shopping in the store and didn’t realize they closed and locked up on him,” the dispatcher says in a recording uploaded by @ScannerSays, a Twitter account that monitors police scanner frequencies in San Francisco. The disptacher, snickering, continues: “He’s actually locked inside the store.”

“This idiot might have to sleep on the floor then,” an officer responds.

Luckily for the absorbed gallery-goer, SFPD officers turned up at 9:20 p.m. and freed him. Employees of the gallery heard nothing about the accidental lock-up and dramatic nighttime rescue, and one even suggested to the Daily News that it may have been a hoax, but SFPD Sargent Monica McDonald told the Daily News that the incident did in fact take place.

Embarrassing though this incident may have been, it is by far the lesser blunder to befall Majestic Collection this year. In June a two-year-old was killed when a sculpture of a dolphin outside the gallery that he was climbing fell on him (see “Toddler Killed In Tragic San Francisco Art Gallery Accident“).