What logical reasoning is there for an untested, unskilled survivor to shoot at what they think looks like a walker when that walker is also surrounded by four men? One of whom is also holding a gun up to that geek's face?
In "Chupacabra", episode 5 of season 2 of the The Walking Dead television series, this scene unfolds when Daryl comes back from near-death and near zombie food. He stumbles out of the woods and the four men (Rick, Shane, Glenn and T-Dog) run up to him, unsure of his state.
While they're huffing and puffing and the mysterious figure is mumbling, Andrea lines up the sight from the RV. Nobody is moving. They're just talking and Daryl is barely standing as it is.
She hasn't proven herself yet to even be able to shoot from a close distance, let alone to take out a target that needs a scope. Let's not forget the four men already surrounding the suspected walker.
Why would she do this? Why risk a bum shot to pop the skull of one of the survivors?