30 years ago today, John McClane entered the Nakatomi Plaza for a Christmas party and effectively changed the way action movies were staged and written forever.

The film has since become synonymous with high-rise buildings, Bruce Willis' career, vests getting progressively dirtier, and Alan Rickman's endlessly quotable lines. So how well do you remember it? We've compiled fifteen questions from the 1988 classic to tax your mind.

As always, no cheating and no Googling. Geronimo, motherf***er.