Comedian-actor Bobcat Goldthwait, who’s made a name for himself as a director, premiered his new film, “Willow Creek,” at the Independent Film Festival Boston Monday night. The movie, which screened at the Somerville Theatre, is about a couple hunting for Bigfoot. On Tuesday, Lake Bell was in town to show her Sundance Film Festival hit “In a World. . . ,” a comedy about a woman in the movie trailer voice-over industry. Bell, who wrote, directed, and stars in the picture, told us before heading out of town Wednesday that her Boston audience (which was technically in Brookline at the Coolidge Corner Theatre) was one of her liveliest. She had just screened the film in England where crowds are a bit more . . . subdued. Some of the local excitement could have been about Bell’s castmates. Her costar Rob Corddry is from Weymouth, and Michaela Watkins, who plays Bell’s sister in the film, hails from Wellesley. IFFB program director Adam Roffman released the winners of this year’s festival prizes on Tuesday night. The Grand Jury Prize for narrative feature went to Chad Hartigan’s “This Is Martin Bonner,” the Grand Jury Prize for documentary went to “Dirty Wars” by Richard Rowley; and the Grand Jury Prize for short film went to “The Last Ice Merchant” by Sandy Patch.