Now that Silas's holding them all at gunpoint, Sophie thinks Teabing's theory about the Church might actually hold water.
Silas demands that Teabing hand him the keystone. Teabing delays and plays up his handicap.
Teabing's a clever sonuvagun. He pretends to fall, but whacks Silas right in the cilice with his metal crutch.
Silas gets off one wild round from the pistol before Sophie kicks him into unconsciousness.
Outside, Collet hears the gunshot, and decides that's his cue. He can't wait for Fache any longer.
When Langdon painfully comes back to alertness he thinks he's hallucinating the gigantic, bound and bleeding, Albino monk.
Teabing is pretty proud of how he brought the monk down.
Once things calm down a bit, Sophie notices what Langdon had done with the box, but before he can show them they become aware that the cops are coming in fast.