Eileen Bridge was washing her car on Saturday when the hawk swooped in and attacked her.
"And when I came up, it just blind-sided me, hit me," Bridge told CBS Pittsburgh. "Knocked me down, I actually fell."
The 64-year-old was knocked unconscious for 15-20 seconds after the collision and had to go to the hospital afterward for a head scan.
"All of a sudden, he came at me at 100 mph," Bridge told Channel 11. "He hit me and knocked me down on my butt... I was a bloody mess. It felt like a baseball bat hit me in the head."
A few days before Bridge was attacked, the hawk took a run at her husband and "glanced off the top" of his head. Her neighbor's chihuahua and Jack Russell terrier were also targeted, though nothing serious occurred.
The Pennsylvania Game Commission plans to remove the nest and relocate the chicks because of the attacks.