ROSEMOUNT, Minn. — A Minnesota high school principal is apologizing for pep rally prank earlier this month in which blindfolded students were surprised to find they had kissed their parents in front of hundreds of classmates.

In an interview Thursday, Rosemount High School Principal John Wollersheim says the event was organized by the high school staff, but he was accountable. A one-minute video of the smooches has gone viral on YouTube.

In the video, the captains of several winter sports teams were lined up along a wall of the gym opposite another line of students. The captains were blindfolded and told they had to guess which student kissed them.

However, the students were swapped out for the parents of the athletes.