Doorknobs

The scene: benign_cremator is instituting a temporary stopgap measure on my doorknob to stop it trapping me inside. (The doorknob is constructed with rivets so he can't just tighten the spring to fix it.)

Me: (jokingly) "Are you reversing the polarity?"
Him: "Yes, actually."
Me: "Wait, seriously?"
Him: "Well, not of the neutron flow, but in general, yes."