My old partner has got a good one, that I am torn or whether or not I am sad I missed it ( vacation day )
They get dispatched to a Dr's office after hours on an assist. No other info other than caller will explain on your arrival. They show up and the doc meets them at the door, ushers them in and back to an exam room. Drops his pants and has a metal cock ring on and his pecker is so swollen he can't remove it. One of the guys on the engine gets a ring cutter and some lube and goes to work. Gets one side cut, but the ring is solid enough not to budge. He starts working on the other side to cut it into two pieces. Just as he is getting to the point of completion, the door busts open with the doc's wife barging in yelling "wtf is going on in here?" Apparently the doc never came home from work, but met his man lover for an evening session. Just as this is happening the ring seperates and the FF doing the cutting gets a healthy nut across his chest when the flood gates are opened.
My buddy still laughs so hard he cries when he tells the story.