25 Things You Didn't Know About Ghostbusters

25. Don't Cross The Streams

Perhaps the biggest truth any of us ever learned came directly from the mouths of our beloved Ghostbusters, and that is under no circumstances should you EVER cross the streams.

According to Egon, crossing the streams as being like "all life as you know it stopping instantaneously and every molecule in your body exploding at the speed of light", which definitely sounds like something you’d want to avoid. Surprisingly though, that iconic line, and important plot point, never existed before filming began.

Ramis would go on to explain that in the final shooting script, any actual mention of how the team manages to defeat Gozer was just left out. When it came to filming, the guys relied on a load of nonsensical psychobabble about what could happen if their blasters overlapped to baffle audiences in the hopes that no one would notice. Fortunately for everyone involved, the plan worked, and an iconic movie moment was born from a split-second decision.