Glancing blow

A Glancing blow is an incidetial hit caused with a two-handed weapon.

In short, when you swing one against your target you may also cause damage to another target due to the weapon's mass. It is an extra attack taken at a -5 penalty to hit. (Author believes this is only on the last hit of a chain, but unverified.)

The damage from Glacing blows is increased by the feat Two-handed Fighting and its predecessors.