Place it right after the blunder, as the reaction that closes the moment, then follow with the Vine Boom Sound Effect for a bigger punch or the SpongeBob Fail Sound Effect when the fail keeps getting worse.
About this sound
This under-a-second clip is one low, drawn-out male voice saying bruh, flat and weary, with no music or other noise behind it. It lands as pure second-hand embarrassment, the sound of giving up on someone after a needless mistake. It began as a May 2014 post by CallHimBzar, pairing Tony Farmer falling on court with a vocal track recorded by Headgraphix.