Place it right after the warning that trouble is coming, then let a bigger reaction follow it to sell the collapse. Pair Enemy Spotted before it for an ambush, and follow it with No God Please No when the failure keeps getting worse, or Run Vine Sound Effect when the character bolts.
Over dit geluid
This is a brief under-two-second shout of 'oh no' from Team Fortress 2, in a high, urgent voice that bursts out and ends in an instant. It feels cartoonishly panicked rather than truly frightening, turning shock and regret into a quick joke. The line comes from Valve's multiplayer shooter, where expressive callouts like this became shorthand for a plan falling apart.