Officer Kenneth Franco drew on his "twelve hours of narcotics training" and discovered the facility was using more electricity than nearby stores, the lawsuit said.

"Officer Franco, therefore, concluded (the facility) was cultivating cannabis, disregarding the fact that it is a diagnostic facility utilizing an MRI machine, X-ray machine and other heavy medical equipment -- unlike the surrounding businesses selling flowers, chocolates and children's merchandise," the suit said.

Disregarding a sign warning that metal objects should be kept well away, one officer wandered near the machine "dangling a rifle in his right hand," the lawsuit said.

"Expectedly, the magnetic force of the MRI machine attracted the LAPD officer's loose rifle, securing it to the machine," the suit said.

Instead of seeking expert advice on how to retrieve the weapon, one officer decided to activate the emergency shutdown button.

"This action caused the MRI's magnet to rapidly lose superconductivity, leading to the evaporation of approximately 2,000 liters of helium gas and resulting in extensive damage to the MRI machine," the suit said.

The officer then retrieved his gun, but left a magazine full of bullets on the floor of the MRI office, the suit says.