“So I found out that it was a mistake when my brother Dan and I got into a fistfight in the middle of the dance floor and ended the wedding,” John recalled, which led to Jimmy’s startled laugh.

The guest then explained why, despite this interruption in the festivities, his family members were not particularly concerned. “You could tell immediately who were guests and who belonged to the Cena family,” he joked. “Because the guests said, ‘What are you going to do to stop it?’ and the Cena family say, ‘No, no, let them find out. Let them do it.’ “

Check out the hilarious and terrifying story in the video above at the same time.

(E !, NBC and Universal Pictures are all part of the NBCUniversal family.)