Fort Collins, CO (AP) Colorado State University students went ahead with Friday’s annual “Undie Run” despite opposition from university UndieRunofficials.

The event started as an end-of-semester clothing donation drive but has devolved over six years into a raucous gathering.

According to KMGH-TV, university police say there were no serious incidents as students ran about in their underwear. University official said in a campus-wide email that it will trash all clothing discarded in the event.