Improv Everywhere, the New York-based group known for their clever and sometimes misinterpreted antics, were recently featured on an episode of the new television version of This American Life (a reprise of their first TAL appearance from two years ago), but in the midst of their heightened fame comes tragedy; a now-defunct 80s jazz group of the same name sent Improv Everywhere a cease-and-desist letter for use of their name after a band member saw the episode. Effective immediately, Improv Everywhere is known as Humor in Public Places (HIPP), but their name may be the least of their problems. UPDATE: Now that April Fool's Day is over, Improv Everywhere has their name back. Those pranksters!