 By choosing to have Ian fire a warning shot at the pigeons, the hardware   store scene is slightly altered. Erin is still killed by the nail gun, but   this time she loses her balance when the pigeons (who didnt leave because   Ian didnt kill any of them) fly in her face and cause her to stumble   backwards. The scene ends with one of the pigeons pecking away at Ian in the   photo Wendy took at the carnival. 