Genuinely the only film where you're begging someone not to open a box.
Fun fact: Brad Pitt refused to make the film unless the studio kept the severed-head ending intact.
A wrinkly little alien who looks like a thumb somehow had the whole planet in tears by '82.
Fun fact: M&M's declined the product placement deal, so Reese's Pieces were used instead, boosting their sales by 65%.