Amidst all the doom and gloom, this made me laugh. It is from a feature in the Guardian Weekendwhich invents new words, like the one we need for that verse the organist starts to play after everyone else has stopped singing.
The reserve spurt of energy that joggers deploy when passing someone sexy, even though they're so exhausted they could throw up their own heart. Body language is transformed from flailing sweatbox to "I'm fit - and so are you, baby. Let's work out." Once safely out of sight, they fall over.