On the show, Cena's girlfriend Nikki Bella informed him of Natalya urinating on herself during a match (against Naomi on July 1, 2013 at a WWE Superstars taping in Sioux City, Iowa). Rather than poke fun at the third-generation grappler's latest incident, Cena changed the subject by recalling a bowel movement mishap of his own.
"I pooped myself once," Cena told the former WWE Divas Champion. "I had to throw [my pants] away. It was in Saskatoon, Saskatchewan, I had food poisoning and I still went out to wrestle. Everybody knew—I was embarrassed."
Cena has relayed the story in the past in radio interviews and to WWE Magazine. However, he told the publication in 2008 that the embarrassing incident took place in a different region of Canada.
"It was in Winnipeg, and I was wrestling Scott Steiner, with Bull Buchanan as my lackey," Cena said in response to a question asking him about the most embarrassing thing that's ever happened to him in or out of the ring. "I got food poisoning and thought I wouldn't be able to wrestle, but went out there anyway. I took a DDT, rolled out and the time-keeper was there. I looked him in the eye and said, "Where do I puke?" And he said, "Under the ring." So I went under the ring and puked and everyone knew it. But as I was puking I crapped my pants. Luckily, it was at the end of the match, but nothing has ever topped that since."
It would appear that the incident actually took place in Jacksonville, Florida (on December 14, 2002 at a non-televised event). According to TheHistoryofWWE.com, Cena only faced Steiner once in 2002, and did not compete at the organization's lone events that year in Saskatoon and Winnipeg (which took place in late-May, before he was promoted to the main roster and Steiner re-joined WWE).
In a voice-over segment, Bella said that she couldn't be more disgusted by her boyfriend's embarrassing admission. "I don't know what to think right now—I guess I'm just thinking about s--t! That would be so embarrassing!"