A California woman claims she got more sharp flavor than she bargained for at a Burger King in Willits, Calif.
Yolanda Orozco was checking her sandwich for onions, she said, when she found a razor blade between the meat and the cheese.
(Read More: Fast Food Is Fattening? Bizarre Class Action Suits)
"I was in shock," she told a local news station.
Police who went to the Willits Burger King she visited found razor blades in various areas, since employees use them for cleaning. They determined that the whole thing was an accident, News10/KXTV reported.
"Food safety is a top priority for Burger King restaurants globally. Burger King Corp.'s strict food handling procedures clearly outline that razor blades are not permitted in or near food preparation areas at any time," a Burger King spokesman said in a prepared statement.
"While this appears to be an isolated incident, BKC takes this matter seriously and is working with the franchisee, who independently owns and operates this restaurant, to reinforce our food preparation procedures and retrain staff. The franchisee is cooperating with local authorities."
This is hardly the first time customers at fast food restaurants said they have gotten a little something extra with their orders.
But there have also been times when fast food companies have been the victims of hoaxes.
In 2005, a Wendy's customer named Anna Ayala claimed she found a finger in her chili. But investigators found that the finger actually belonged to a man who lost it in an accident and gave it to the husband of Ayala, who then tried to scam Wendy's. She spent four years in prison.
(Read More: Summer Fair Food: Sloppy Joe on a Doughnut)
But as for the Willits Burger King incident, maybe the razor blade will at least shave some of the fast food calories away.
—By CNBC's Kelley Holland.