Place it just before the turning point in your edit, then follow it with It Was At This Moment He Knew once the plan falls apart, and finish with Fail Sound Meme if the outcome is a clear flop.
About this sound
This short clip is Samuel L. Jackson delivering the line 'Hold on to your butts' in a firm, urgent voice, lasting just over a second. It feels tense and funny at once, like a warning issued seconds before everything goes wrong. The line comes from Jurassic Park, spoken by Ray Arnold as the park's systems fail.