School officials in New Jersey warned parents on April 17 to talk to their kids about the persistent, dangerous and sometimes deadly TikTok “blackout challenge” after an attempt sent a student to the hospital.

“These incidents are very scary and very avoidable,” South Orange Middle School Principal Lynn Irby Hill said in a letter to parents about the challenge’s popularity, reported ABC 7. “We will continue to warn our students about the dangers of the ‘blackout challenge’ and most, if not all, challenges promoted on social media.”