'Write what you know!' they say. Well, when you're disabled and unlucky in love, the thing you know the best is falling. In and out of cars, off chairs, and in and out of love.
John's made a career (so far) out of talking about one of them (his propensity for injuring himself, and all the hilarity that comes with it), but now he'll take on the other subject, finally, fully. That's love.