10:20 PM EDT 08/23/2014
Originally posted 08/03/2010 05:00PM
Eva Mendes and Will Ferrell play an unlikely married couple in their upcoming comedy, The Other Guys. But shooting an improvised argument scene together proved to be no joke.
"Once we got the scene down, we were told to improv," Mendes, 36, told PEOPLE at the movie's Manhattan premiere Monday. "We got into a little tug of war, and I picked up what was supposed to be a prop knife."
Unbeknownst to the actress, "it was actually a carving knife from our meal. I lunged at him, and I was really proud of myself."
Then she realized her mistake.
Top 10 News Categories
The most buzzed about stars this minute!
Treat Yourself! 4 Preview Issues
More On PEOPLE.com
Got a News Tip?
Send it to our People.com editors!