Pit lane pile-ups, dastardly drain covers, and freak fire extinguisher attacks: these are the top 10 weirdest Formula 1 retirements over the years.

    Having to pull out of a race is a common occurance in F1, but the causes in the video above are anything but common. There's Gerhard Berger getting knocked out of the 1995 Italian Grand Prix thanks to a loose onboard camera from team mate Jean Alesi's Ferrari, Johnny Herbert finding a spanner in his Sauber cockpit mid-race, and even Hans Heyer’s sneeky foray onto the grid for a race he didn’t even qualify for…

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