Wish those cameras were out in the 80's - would have had scary video. In a light twin, instrument approach (rwy 7) on one engine, student recovering from bypass heart surgery (glad he was under the hood), on tower frequency, cleared to land #2 behind a 152 which was no factor. Cheyenne calls in 5 SE, told to cross mid-field, enter left downwind #3 following Seneca at the outer marker. I got a visual on him as he crossed the field, he entered left downwind and passed off my left. Everything good. We continued our approach and about 500 ft agl this terrible noise came roaring overhead. Yeah, the Cheyenne! If I could have freeze framed that moment I could have counted every rivet on the undercarriage of that plane. I still to this day do not understand how he missed us with his gear. Luckily he overshot the final course a bit which gave me the space to firewall both throttles and do a climbing left turn to avoid him. Paperwork was filed and this wasn't his first rodeo so he lost his ticket. He was flying the plane for Piper bringing it up for a prospective buyer. Radar returns pulled for the paperwork couldn't separate us. A teacher leaving a nearby school heard the planes above, looked up and said one plane had to take drastic action to avoid the other. She had called the tower to report what she saw. The Cheyenne pilot never responded to calls from tower or ground upon landing. I, of course, had made them aware of what happened about the same time they were trying to figure out where the Seneca went!! And yes, they should have been paying closer attention. At that time ORL's tower was over the terminal. He was taxing to the terminal and was met by tower supervisor and security. He didn't want to show his identification until security advised him it would be in his best interest!
That's the closest I ever came to a midair. I think any closer and we both would have been tangled up. Have to wonder how a pilot flying for Piper couldn't tell the difference between a Seneca and a Cessna.