Treehouse of Horror "Nightmare at 20,000 Feet", "Little Girl Lost", and "The Little People". The "Bart's Nightmare" segment of "Treehouse of Horror II" parodies the episode "It's a Good Life" and is even presented in a format similar to an episode of "The Twilight Zone". The Halloween episodes also regularly parody horror and thriller films such as "The Exorcist", "The Amityville Horror", "King Kong", "Night of the Living Dead", "The Shining", "A Nightmare on Elm Street", "The Fly", "Psycho", "Paranormal Activity", and "Dead Calm". Robert Englund, who portrays Freddy Krueger in the "Nightmare on Elm street" franchise, had a cameo appearance in "Treehouse
Krueger flap flaps and outboard slats, although it had no engine between them. Most early jet airliners, such as the Boeing 707 and Boeing 747, used Krueger flaps only. While the aerodynamic effect of Krueger flaps may be similar to that of slats or slots (in those cases where there is a gap or slot between the flap trailing edge and wing leading edge), they are deployed differently. Krueger flaps, hinged at their foremost position that once deployed actually become their trailing edges, hinge forwards from the under surface of the wing, increasing the wing camber and maximum coefficient of lift. It