Place it at the peak of a failed plan, just before the consequences play out, then follow it with Wrong Answer Game Show to underline the mistake and Nelson's Ha-Ha! to close the sequence. For a softer landing, use Sad Violin instead of the laugh.
About this sound
This short clip captures Mister Metokur repeating no three times before asking what were you thinking, delivered in a sharp, exasperated voice over just over three seconds. It feels instantly disapproving and mockingly incredulous, like catching someone mid-bad-decision. It comes from Metokur's commentary on the 2019 Sonic the Hedgehog film, where he reacts to a baffling creative choice.