PASADENA, CA - JANUARY 02: USC Trojans head coach Clay Helton reacts during the 2017 Rose Bowl Game presented by Northwestern Mutual against the Penn State Nittany Lions at the Rose Bowl on January 2, 2017 in Pasadena, California. (Photo by Harry How/Getty Images)

USC player takes out frustrations over upset loss on poor fan rushing the field

That's going to leave a mark.

Washington State fans rushed the field after their team's 30-27 win over USC on Friday night.

However, one fan may have regretted that decision.

video shared via Facebook and Reddit showed an unidentified USC football player pancaking a Cougar fan as the Trojans ran off the field. While it's not confirmed whether the hit was intentional, it does look like the player bent down and extended his hands to land a textbook hit on the fan.

The identity of the player has not been confirmed as the video quality is too grainy to see his number from a distance.

Ironically, Martin Stadium PA announcer Glenn Johnson — the mayor of Pullman, Washington — was cautioning fans not to rush the field during the incident.