Sorry for the redundancy if I already addressed this in this thread, but I don't think I did. One scene that I think was highly effective was when Supes has to testify before the Senate Committee. What I think was masterfully done there was the toying with audience expectations.
When you see Holly Hunter turn the glass around and it says, Granny's Peach Tea, the audience inclination is to laugh based on the implication that Luthor vindictively pissed in her glass. Both times I saw the film in a theater, there was widespread laughter in the audience and then BOOM...highly jarring, unsettling, even frightening moment made more so because of the way that was set up.
But on watching it again, Holly Hunter really plays that perfectly. When she sees that tea, she doesn't have an angry look that says, "that little douche," or something like that- she is completely thrown off, stuttering, and shaken. She knows something is up and seems outright terrified right before the explosion. Great actress and she did a lot with a small role.