April Fools' Day (1986)

Title: April Fool's Day

Release Date: March 27, 1986

Budget: $5 million

April Fools' Day  is a big budget Slasher / Comedy released by Paramount Pictures- It was produced by Frank Mancuso, Jr. (Producer of Friday The 13th sequels part 2-8)

Plot
A group of college friends: Harvey, Nikki, Rob, Skip, Nan, Kit and Arch, gather to celebrate Spring Break by spending the weekend at the island mansion of their friend, Muffy St. John, on the weekend leading up to April Fools' Day. The tone is set almost immediately with Muffy preparing details around the house, and finds an old jack-in-the-box she remembers (in flashback). Her friends, meanwhile, are joking around on the pier, then on the ferry to the island. But en route to the island, Buck, a local deckhand is seriously injured in a gruesome accident.

Once on the island and in the mansion, it turns out Muffy has set up a variety of little jokes from the simple (whoopee cushions, dribble glasses, etc.) to the more complex and disturbing (an audiotape of a baby crying in someone's room, heroin paraphernalia in a guest's wardrobe, etc.) Through it all, the friends in general try to relax. But then, Skip goes missing. Kit catches a glimpse of what looks like his dead body. Next, Arch and Nan also go missing. During a search, Nikki falls into the island's well and finds the severed heads of Skip and Arch and the dead body of Nan. Afterward, the remaining group discover that the phones are dead, and there is no way to get off the island until Monday.

One after another, people keep vanishing or being killed and their bodies being found. Kit and Rob put together some clues, realizing that everyone's earlier assumption is wrong. The kinsman of the deckhand injured when they arrived is a red herring. Muffy, it turns out, has a violently insane twin sister, Buffy, who has escaped. In fact, the Muffy they have been around since the first night was Buffy pretending to be Muffy. They discover Muffy's severed head in the basement.

Buffy chases them with a breaking knife, and the couple are separated. Kit flees from Buffy into the living room — where she finds everyone else there, alive and calmly waiting for her. It was all a joke, or more accurately, a dress rehearsal. It is revealed to the audience that the whole movie was never a slasher film from the start, but rather pretending to be one. Muffy hopes to turn the mansion into a resort offering a weekend of staged horror. She even had a friend who does special effects and make-up for Hollywood help. Each "victim" agreed to take part as things were explained to them.

Everyone has a huge laugh, and break out lots of bottles of champagne. Later that night, a half-drunk Muffy goes to her room. She finds a wrapped present on her bed. Grinning, she unwraps it. It is the Jack-in-the-Box. Savoring the surprise, she turns the handle slowly. When "Jack" finally pops out, Nan — the shy, bookish girl who knew Muffy from acting class, emerges from behind her and slits her throat with a razor. Muffy screams, but then realizes she is not really bleeding. She "got" her with a trick razor and stage blood. The film ends with the Jack-in-the-box winking at the audience.

Credits

 * Jay Baker as Harvey Edison, Jr.
 * Deborah Foreman as Muffy/Buffy St. John
 * Deborah Goodrich as Nikki Brashares
 * Ken Olandt as Rob Ferris
 * Griffin O'Neal as Skip St. John
 * Leah Pinsent as Nan Youngblood
 * Clayton Rohner as Chaz Vyshinski
 * Amy Steel as Kit Graham
 * Thomas F. Wilson as Arch Cummings