Teenage mental illness forms the center of writer-directors Ryan Fleck and Anna Boden’s “It’s Kind of a Funny Story.” As a result, one might expect a drama along the lines of their debut “Half Nelson” (2006), which tackled heroin addiction from a fresh perspective, or the little-seen “Sugar” (2008), which follows a kid from the Dominican Republic and his desire to play professional baseball. Those were good indie films, and “Funny Story” makes a step toward the mainstream by adapting a popular young adult novel by Ned Vizzini.
But by edging toward box office success, they’ve dropped a lot of the writing skills that made their debuts so successful. In trade, they get a great performance from co-star Zach Galifianakis, who the studio is using to suggest this is some sort of follow up to “The Hangover.” It’s not.