Unless the batsman played a leg glance which was fielded by the keeper, in which case the silly point or other close-to-the-bat fielder would be expected to cover the stumps.

Oh Doc, did you read Faldage's original cricket post? It said:

Imagine, if you will, the batsman hitting the ball to the silly mid on

See? My reply was based on this scenario. It was hit to silly mid-on. It wasn't a leg glance. It'd be pretty difficult to leg glance to silly mid-on.

Not that you can get two wickets at one time anyway.

I'm (unfortunately) with sjm on this one - it's a high improbability, but not an impossibility.