Two Oklahoma City movie theaters posted warnings that watching the movie "Cloverfield" could make them nauseous, KOCO.com reported.
The warning signs, according to the report, read: "Due to the filming method used for "Cloverfield," guests viewing this film may experience side effects associated with motion sickness, similar to riding a rollercoaster."
Theater managers have received several complaints, and in some cases have had to refund tickets, according to the report.
"Cloverfield" is the story of five young New Yorkers experiencing a monster the size of a skyscraper descending on the city, according to imdb.com.
The movie is told from the point of view of their video camera, the Web site reports.