Place it right after the excuse is shown on screen, then follow it with the CJ Here We Go Again clip to underline that this has happened before, and finish with the Nope sound when the denial is rejected outright.
About this sound
This short voice clip has Postal Dude delivering the line “that’s what they all say” in a flat, slow, weary tone, with no music or background noise behind him. It feels coldly funny and dismissive, turning a denial into something nobody is meant to believe. The line comes from the Postal games, where the unnamed protagonist reacts to an absurd world with the same deadpan sarcasm.