I recently watched Airplane II: The Sequel. This is a sequel (duh) to the 1980 movie Airplane!, which set out to parody the disaster movie genre. The plot is completely ridiculous, but I will outline it anyway.
Ted Striker, the ex-army pilot who overcame his shell shock to safely land a crewless 767 at Chigago airport, is in a psychiatric unit after a crash during the testing phase of the new XR-3 moon rocket. When he finds out that the rocket is set to launch, despite numerous safety faults (which have been covered up), he escapes to try and save his love, Elaine, a lieutenant on the shuttle. When a circuit fault causes the computer to go insane and lock their course towards the Sun, Ted Striker is the only one that can save the crew...
Basically, the film is a brilliant follow-up to the original, and features many hilarious gags;
In the background of one scene with a security scanner, many armed militia are seen walking through unchecked with heavy machineguns and bullet belts, but when an old lady beeps, the guards throw her against the wall and frisk her, while more militia walk through.
A stewardess tells the passengers that the ship is crewless, the computer has gone insane, and that the ship is locked towards the sun. The passengers remain calm, but one person asks, 'Stewardess, are you telling us everything?', to which the reply is, 'No...we're also out of coffee'. Chaos ensues.
The film makes several references to 2001: A Space Odyssey, witht he computer killing two crew by blowing them out of the airlock. Striker (a passenger at this stage) has put his headphones on, and looks out the window to see the two crew waltzing as they drift off into space. He's listening to the waltz played during the exterior repair section of 2001.
William Shatner plays the commander of the moon base. One of his subordinates calls him up on screen to inform him of the situation. Shatner then opens a door, and we can see that what looked like a screen was simply a window. Also, all doors in the moon base are voice activated with a 'Phsssh!' command...
Those are only some of them...the others are brilliant too, and I would suggest you watch both of them, as they are first class comedy!