(An irate caller is being very nasty and swearing at me down the phone.)

Me: “Ma’am, if you carry on talking to me like that, I will terminate the phone call.”

Caller: “Go on, then. I f***ing dare you.”

Me: “I would like to carry on this conversation calmly, but I will terminate the phone call if you carry on swearing at me.”

Caller: “I f***ing dare you.”

Me: *hangs up*