"The Avengers," much awaited by Marvel comics fans, assembles all of the Avengers in one film: Iron Man, Captain America, Thor, the Hulk, the Black Widow and Hawkeye. This is like an all-star game, or the chef's sampling menu at a fancy restaurant. What always strikes me is how different their superpowers are. Iron Man (Robert Downey) is just an ordinary guy until he's wearing his super-suit. Thor (Chris Hemsworth) swings a mighty hammer. Hawkeye (Jeremy Renner) wields a bow with arrows so powerful they can bring down alien spacecraft. The Hulk (Mark Ruffalo) is a mild-mannered guy until he gets angry, and then he expands into a leaping, bounding green muscle man who can rip apart pretty much anything. Captain America (Chris Evans) has a powerful and versatile shield. Then there's Natasha (Scarlett Johansson), aka the Black Widow. After seeing the film, I discussed her with movie critics from Brazil and India, and we were unable to come up with a satisfactory explanation for her superpowers; it seems she is merely a martial artist with good aim with weapons. We decided maybe she and Hawkeye aren't technically superheroes, but just hang out in the same crowd.