Exploding Wombles Perhaps?
I know Wimbledon gets its fair share of odd weather, but a couple of comments the other night suggest they're expecting something a bit more dramatic that the odd rain-break.
Firstly, a commentary over a romantic view of the sun setting behind the courts went along the lines of "there's the sun, setting in the west as usual" to be followed a few minutes later by Sue Barker dropping "if the sun comes up tomorrow" into a round-up of the order of play.
Do they know something we don't?