He is very respectful in theaters. We went to see Coraline together, in 3D, and at most, he giggled, quietly, during the trailer for Ice Age. Like I said, he's really level headed(more so than most adults, it seems sometimes), so I'm pretty sure if it gets too crazy for him, he'd ask to leave or take a break, and I'm fine with that. He is super respectful, so he won't make a lot of noise. I'm going to talk to him more about it later.
And I will definitely check out that site later, when I'm on an actual computer. Thanks.