Exact same for me, except I'll also add "With great power comes great responsibility." Both times it was uttered, the place just went nuts.
The best, though, was the reaction to Garfield showing up - just absolute pandemonium - but then, like two minutes later, when the audience realizes Tobey is right behind him, and they finally see him, it was so loud my seat was actually vibrating. In fact, for a quarter of the audience or so, it reminded me of the footage of teen girls seeing The Beetles in person. Like, legit SCREAMING, on the verge of tears almost. I've never experienced anything like that in a movie theater.
The loudest cheer, however, was definitely for Garfield saving MJ. It wasn't the longest or the screamiest cheer, but man, that was the game-winning-touchdown level you mentioned.
Just so much fun all around.