The magnet is never turned off. He walked in and the magnet grabbed the buffer slamming him against the magnet while trying to pull the buffer through his body. He hit the quench button to stop it but if the emergency ventilation isn't clear he would have been dead in a couple of minutes. It worked but all of the plants around the vent outside were killed. Wicked stuff. He was lucky. He'll have nightmares for years about a machine trying to kill him. That and a big check and somebody will be getting fired. Only special MRI safe equipment is allowed in that room. Will cost 100k to get the room working again plus what they pay him.