An officer then allegedly pulled a sealed emergency release button that shut the MRI machine down, deactivating it, evaporating thousands of liters of helium gas and damaging the machine in the process. The officer then grabbed his rifle and left the room, leaving behind a magazine filled with bullets on the office floor, according to the lawsuit.
I heard once that old smoke detectors have some radioactive isotopes in them. Not sure how true or dangerous but sounds bad.