Appearing at Comic-Con to promote The Expendables 2, a sequel to 2010 film that was packed full of action movie stars including Jason Statham and Dolph Lundgren, co-stars Sylvester Stallone and Arnold Schwarzenegger traded friendly jabs about each other's bumpy careers.

When a fan asked Stallone which of Schwarzenegger's films was his favorite, he replied, "Junior," the 1994 comedy in which Schwarzenegger played the world's first pregnant man. To show the joke was all in good fun, however, Stallone referenced his own widely panned film, Stop Or My Mom Will Shoot, according to the Huffington Post.

Never one to concede a fight, Schwarzenegger got his own dig in by saying that Stallone was his English teacher when he first moved to the U.S. (Schwarzenegger spoke notoriously poor English early in his career).

The Expendables 2 promises even more '80s and '90s action movie nostalgia with a cast stacked with Bruce Willis, Jean-Claude Van Damme, Jet Li, Chuck Norris and newcomer Liam Hemsworth. It hits theaters August 17.

Watch the trailer for The Expendables 2 here:

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