Place this clip right after the confusing line lands, then follow it with Ceeday Huh for a second beat of disbelief, or let Nelson's Ha-Ha! close the bit when the confusion turns into mockery from the group.
About this sound
This clip is a short spoken French phrase, "Mon port fait pas mail," delivered as a straight-faced reaction line lasting just under six seconds. It feels funny and baffling at once, the kind of nonsense reply that makes a serious conversation suddenly sound absurd without explaining anything at all.