Put it at the very end of a fail edit, after the mistake has played out and the reaction is clear. Open with Shocked Meme Sound to mark the surprise, then let this clip close the scene, and follow it with Oh No No No Laugh if the group wants one last light beat.
About this sound
This is a short spoken clip, just over three seconds long, delivering the line 'This is the end lol' in a flat, deadpan voice. The dry delivery makes the ending feel sudden and a little awkward, turning a small failure into a joke instead of a drama. It works as a wry sign-off, landing best when the moment has already gone wrong and everyone knows it.