JACKSON, Tenn. — A Tennessee teacher has been suspended after part of the gruesome horror film “The Human Centipede 2: (Full Sequence)” was played to a class of ninth- and 10th-graders.

News outlets report that according to a personnel file, Jackson Central-Merry High School teacher Michelle Blankenship was suspended without pay on April 22. The incident occurred April 20.

Superintendent Verna Ruffin says the district is investigating how and why the movie was shown to students under Blankenship’s supervision. The film is unrated in the United States. However, the British Board of Film Classification gave the movie an 18 certificate, the rough equivalent of an NC-17 rating in the United States.

“The Human Centipede” first premiered in 2009, and follows a deranged doctor’s attempt to sew together humans by surgically attaching a victim’s mouth to another one’s anus. “The Human Centipede 2” premiered in September 2011.

Ruffin says it’s unclear how much of the movie the students saw, or whether the movie was put on by a student or Blankenship.