Why, you ask? Well, Zac's kind of a perfectionist. "As far as watching myself on screen, I tend to, especially the first time around, pick out every single flaw, or things I could have and should have done better," he says. "I don't know why, but I tend to dwell on those things."
But that doesn't mean the 22-year-old never watches his own films. "I'm more of a cringer at first," he reveals. "And then, when it's years down the road and it's out of the way, I can look back and appreciate it somehow."
Want to hear more from Zac? Check out our exclusive interview with him here. Did you guys see Charlie St. Cloud last weekend? What did you think? We saw it, and even though we were crying half the time, we totally thought Zac was amazing. Let us know your thoughts in the comments below, or if you still haven't seen it, check out the trailer for the film after the jump.