LEESBURG, V.A. (CBSNewYork) —  Three brothers in Virginia played a prank on their little sister by seemingly convincing her of a zombie apocalypse following her wisdom teeth surgery.

The video posted by YouTube user Cabot Phillips was uploaded on Monday with the description, “Last week after our little sister’s wisdom teeth surgery, we convinced her that a zombie outbreak had hit our city. Her reaction was priceless.”

Following her surgery, the brothers stage a fake warning over the radio from the Centers for Disease Control and Prevention saying, “State and local officials have reported cases of high fever, nausea, death, and even cannibalism.”

After that, the journey of battling zombies unfolds as Millicent’s brothers egg her on with questions of what weapons to use for defense, what pet to take, and what kind of cake should be eaten for survival.

“We just didn’t anticipate how expressive she would be, and how many one-liners she’d produce — even when terrified and in a drug-induced state,” Phillips told USA Today.

Millicent gets particularly animated when asked which pet they will be taking along, screaming, “The cat you idiot!”

When asked if the family should stop by Costco before escaping town, Millicent says confidently, “No, it’s going to be a blood bath in there!”

After a few minutes, the brothers let their poor sister in on the joke, saying they’re sorry and that they love her.

Watch the full video above.