IIHS documents the whole process of a crash test from start to finish.

New-vehicle crash testing is crucial to measuring how safe vehicles are for their occupants in the event of an accident. The actual test is quick: vehicles are pulled down a runway inside the test facility before they're smashed into a seemingly invincible wall. Carnage ensues.

We presumed test preparation included strapping in a dummy, fitting cameras and installing data acquisition devices, but we had no idea that the whole process is exponentially more involving than that until the Insurance Institute for Highway Safety (IIHS) released this video documenting a crash test from start to finish. Head below to watch it (and to check out the short press release), and be prepared to have you mind blown from the complexity of it all.

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ARLINGTON, Va. - A lot goes into preparing a vehicle before it is sent hurtling toward a barrier in an IIHS crash test. A new web video takes viewers through the complex process.

"Inside IIHS: Preparing for a crash test" shows how engineers at the Institute's Vehicle Research Center attend to every detail to ensure a smooth crash test with results that can be easily measured and compared with other vehicles. Everything from the exact position of the seats to the angles of in-vehicle cameras and lights must be adjusted. Fluids are drained from the car, and gasoline is replaced with a purple-dyed solvent to detect leaks.

The video is available on the IIHS YouTube channel and is part of the "Inside IIHS" series. Previous installments have focused on different types of crash tests, crash test dummies, the propulsion system used to power the tests and the Institute's booster seat rating program.