Place it at the very end of a death or betrayal clip, after the action has finished, so it acts as the closing reply. Open with No God Please No as the panic builds, then follow with this clip, and add Roblox Oof just before it if you want the fall itself to land harder.
About this sound
This is a short 'Thank you' spoken by a Dark Souls carving, in a thin voice that sounds far away and oddly toy-like. The clip lasts under two seconds, and its politeness feels funny and unsettling at once, like manners appearing in the middle of a grim fight. It comes from the Carvings in Dark Souls, the 2011 action RPG by FromSoftware, where these usable items play short voiced phrases.