Erin Strecker
August 03, 2012 AT 01:00 PM EDT

As if anyone needed more proof that Jennifer Lawrence is tough as nails, check out this EW exclusive clip from the special features of the Blu-ray/DVD of The Hunger Games, where viewers can take a behind-the-scenes look at how Lawrence trained for Katniss, and why the crew made her her own climbing gym.

Inside scoop: The knots on the tree in her training gym became the same as the ones in the movie so Lawrence could accurately practice her climb — complete with a harness, of course.

Watch Lawrence show her strength below:

The Hunger Games is on DVD and Blu-ray August 18.

Read more:

‘Hunger Games’ behind-the-scenes: Jennifer Lawrence talks portraying Katniss — EXCLUSIVE VIDEO

‘Sex and the City’ star Lynn Cohen cast as Mags in ‘The Hunger Games: Catching Fire’

Amanda Plummer to play Wiress in ‘The Hunger Games: Catching Fire’ — BREAKING

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