EDMOND, Okla. -- You'll find terror at every turn. Party Galaxy in Edmond specializes in Halloween horror.
But the real fright comes after you leave the store.
Manager Tammie Alexander said, "It's total chaos in the trees. They sound really scary."
When the sun goes down, the birds come out.
Thousands of grackles have invaded the trees, power lines and building tops near 33rd St. and Broadway.
Melissa Brandenburg said, "Oh my God. I didn't know they got that loud. Are you sure they aren't bats? They look like bats. WOW!"
This large flock arrived a few weeks ago, foraging for food.
The raucous chattering is spine chilling to anyone familiar with the Alfred Hitchcock classic.
Kendall Wildman said, "If you've seen the movie, yes, it would be creepy. I'd jump into my car to get away from those creepy birds."
These blackbirds are harmless, unless you're a skittish shopper or a parked car in the drop zone.
And this macabre scene will linger... long after the creepy ghouls and goblins retire for the night.