other distributors air on the block. Some movies and special presentations that Nick at Nite aired during 2010 and 2011 had occasionally aired over what is normally Nickelodeon's broadcast time (for example, the February 21, 2010 premiere broadcast of the special School Gyrls aired at 7:00 p.m. Eastern Time, though Nickelodeon typically does not turn over its channel space to Nick at Nite until 8:00 p.m. Eastern Time on Sunday nights), which is unusual as some of these special presentations are aimed at Nickelodeon's preteen target audience; however until May 2010, when the network began promoting its film broadcasts as airing on Nick at Nite, promos for these films did not acknowledge whether they were to be broadcast on Nick at Nite or Nickelodeon (an issue as promos for scheduled primetime films were cross-promoted with Nickelodeon), with the only reference as to the film's airing on Nick at Nite coming from the screen bug that is shown during the film. Some of the movies Nick at Nite has broadcast in recent years have included the Back to the Future trilogy, Ferris Bueller's Day Off, Baby's Day Out, Pretty in Pink, National Lampoon's Vacation, Ghostbusters (and its sequel Ghostbusters II), Jurassic Park, The Nutty Professor, Legally Blonde, The Princess Diaries and The Parent Trap. Film broadcasts have become more common on Nick at Nite since fall 2012, often airing on a near-weekly basis, typically on Sunday evenings. Original programming Nick at Nite has also occasionally broadcast its own programs, sometimes with bizarre and surrealistic results. On December 5, 1987, the channel ran a contest called the Do It Yourself Sitcom Special, which was billed as the first time that real people ever had their own television shows. Viewers submitted their own sitcom ideas and the winner would supposedly get their own show. In 1988, the channel aired a half-hour animated Christmas special from Ralph Bakshi, which served as the pilot for a proposed animated series titled Tattertown. The program was never picked up to series, but the special, later renamed Christmas in Tattertown, aired on Nick at Nite every Christmas for several years. In 1990, the channel briefly aired a satirical comedy series called On the Television, a mock critic show hosted by Siskel and Ebert-type characters that featured bizarre, sometimes disturbing clips from spoofed television shows supposedly beginning that week. In the early 1990s, the channel ran a one-time special