Iron Man 2... the Second

My little brother has been visiting me for the weekend, which has been particularly pleasant. Among the many things we've done together, we saw Iron Man 2, which was his first time seeing it and my second time. As I watched, I'm slowing developing the theory that Robert Downey Jr. is the new Johnny Depp. You might be asking yourself, "What happened to the old Johnny Depp?" Theoretically nothing has happened to him, but his film ties to Tim Burton have grown over the last three years or so and he's no longer that character actor he used to be but more of a character. Whereas RDJ has easily adapted to that easy character actor role: Sherlock Holmes, Tony Stark, that guy in Tropic Thunder, etc. RDJ = awesome.

I'm seeing 'Tosca' tomorrow and I'm scared I won't understand it. I just reread a synopsis three times. Why is opera illogical?