Production is currently under way on director Joss Whedon's Avengers: Age of Ultron in South Korea, with a new video from the set showcasing a scene involving Chris Evans' Captain America stunt double. The actor is seen standing atop a moving semi truck and hanging off the back door. Of course, it isn't known exactly why Cap is hanging on for dear life in traffic, but you can take a look at the footage below. You can also CLICK HERE to take a look at the new costumes for Captain America and Black Widow (Scarlett Johansson), along with Jeremy Renner (Hawkeye) and new cast members Aaron Taylor-Johnson (Quicksilver), Elizabeth Olsen (Scarlet Witch) and the Ultron mask.

In related news, Chris Evans revealed in a new interview with the Toronto Sun that his experience playing Johnny Storm in Fantastic Four is part of the reason why he wasn't sure if he wanted to play Steve Rogers.

"The Fantastic Four had a lot to do with my concerns about playing Captain America. Those Fantastic Four movies... how do you say this correctly? This is where interviews get tricky. If you're going to get locked up in a long-term contract, you've got to make sure the movies you're making are movies you'll be proud of. With a lot of movies I've made, I've had something to question. And the Fantastic Four was a three-movie deal (though only two were ever made). Captain America was a six-picture contract (counting three Avengers movies). And Robert Downey Jr. had already set the tone with the Iron Man movies, there already was a following. So those six movies were for real."

Of course, it all worked out in the end, although the actor reminisced that it would have been the biggest mistake of his life if he had turned down the Captain America role.

"Had I not done these movies, it would have been the biggest mistake of my life, my biggest regret - and there are plenty. In retrospect, Marvel has been a beautiful element in my life, affording me the opportunity to do such things."

The actor also commented on The Fantastic Four reboot, and the actor who is portraying the new Johnny Storm, Michael B. Jordan.

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"I think it's great that they're picking it up again. There's a lot more story to tell. And I think Michael B. Jordan is just a phenomenal actor."