Interview behind the cut
It’s a good thing Taylor Lautner spent all that time building up those much-discussed muscles of his, because it turns out he needed them during the filming of a particularly labor-intensive scene in “Eclipse.”

“There’s a scene where I’m carrying [Kristen Stewart], and it’s also, like, four pages of dialogue,” Lautner told MTV News. “So I’m carrying her, and we’re walking through the woods, and I’m talking to her, and it’s a pretty intense talk. We actually had plans, a rig that was basically going to carry her, and I was just going to pretend that I was carrying her. We got there on the day, and the rig didn’t look very natural. They were like, ‘What are we going to do?’ and I’m like, ‘I’ll just carry her. She’s like, what, 110 pounds? It’s no big deal!’ ”

So he thought. Unfortunately for Lautner, it was no quick take. “We filmed that scene all day long,” he said. “Did the wide shot, did my close-up, did her close-up, the back shot, everything. It was so hard. … It was painful.”

Something else that was painful — or looks painful onscreen at least — is a scene in which Lautner’s Jacob gets a little too forward with Stewart’s Bella and earns himself a swift punch to the face.

“It was rough,” Lautner said of the scene. “Let’s just say the second kiss was a lot better than the first.” He added that things could have been worse for him, had they let Stewart actually make contact with Lautner’s face. “I wanted her just to give me a shot, let her punch me once, and we’ll be done. Of course, we couldn’t do that, so it was some major technical thing where I had to stand there and pretend I’m getting punched and then … we had to have her fist punching a bag. It was very technical.”
source: MTV