If someone starts making trouble, he says 'If you're looking for trouble, mate, come to me first'.

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"When you walk into a room, even if you don't know who George is, you know he is someone, " says one former colleague.

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"It's not a good job from a financial perspective, but it includes the interesting parts of medicine, and if you make a mistake you haven't done in someone's grandma, " says Kocher.

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If you don't get on with someone, you still have to try your hardest, he says.

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It's the same thing if someone's got a driving licence, that driving licence says that you are competent to drive, but we know from the accident statistics a lot of people do not drive competently.

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"There is obviously a lot of anxiety with talking to a past partner about a diagnosis, particularly if you're not close to that person, or if it was a casual partner, or if it was someone that you had a falling out with, " says Jenny McManus, the company's director of operations.

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Now if someone says to me they don't want to hear that, then you need to back away.

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"It would be like someone asking you if you wanted to switch off your sight for 20 minutes, " he says.

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But Zittrain says that if someone is running a company, they are under extreme pressure, and if you are designing a system from the top, you want to design the system recognizing that people have to play their roles.

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For example, Klinge says, you might want to check to see if the club has a defibrillator on hand and someone on staff who is trained to use it.

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