At age 56, it may seem impossible for Tom Cruise to do his own stunts, pilot doomed helicopters, run his own cameras and lead high-speed motorcycle chases. But he and his co-stars do all this and more in the sixth entry in the breathless action franchise, “Mission: Impossible – Fallout.” Ethan Hunt and his IMF team must attain three nuclear warheads from powerful and skilled anarchists before the terrorist group kills millions. Henry “Superman” Cavill joins the team as an intrusive CIA operative who authorities force on the crew. Plot-wise, it’s goofy, convoluted and, yes, impossible. But there’s enough explosive action and spectacle in “Mission: Impossible – Fallout” to please demanding and undemanding fans alike. Joaquin Phoenix gives a powerful performance as famed paraplegic cartoonist John Callahan in “Don’t Worry, He Won’t Get Far on Foot.” This irreverent and sharply acted biopic concentrates not on Callahan’s work or the controversial subject matter of his cartoons, which often poked fun at people with disabilities. Instead, writer-director Gus Van Sant focuses on Callahan’s recovery from alcoholism and his struggle with a number of emotional demons. The rock-solid supporting cast includes Jonah Hill, Rooney Mara, Jack Black and Carrie Brownstein. The film’s structure,…