BEST: Sounding the dinner bell
Alpha banging her shotgun against the side of a gas station to attract walkers was a great move on her part. Since Daryl is wounded with a knife in his leg, blood on his face, and only a crowbar to defend himself, surrounding herself with the undead is smart.
With her mask allowing her to move among the walkers undetected but a shotgun to still be able to take a shot at an escaping target, this is a very effective way to make absolutely sure the Whisperers have the upper hand in this battle.
Plus, the walkers that came in the woods were absolutely frightening. Mostly decayed and covered in moss, being able to see the rib cage of these undead monsters is also a reminder of how long the dead have been roaming the earth.
Betting against Daryl in any situation is usually a bad idea, but fans have to hand it to Alpha for not running in hot-headed for a one-on-one encounter, which would have been tempting with one of your opponents in such an obviously weakened state.