Having a contestant like John who is clearly a massive fan, has watched the show and really wants to win can be very annoying, but it's working with John because he isn't a twat about it.
And you know every time he comes up with the clever way around, he is genuinely terrified he's missed something and is gonna get disqualified. And I just like how it's being played out in the studio, building the tension, because at some point in the series I'm hoping there is gonna be a pay off, after a long pause and John thinking he's done a good job, Alex is actually gonna say "but" and he's gonna get disqualified from a task.