Place it immediately after the unrealistic goal is stated, then follow it with another confused huh for a double reaction. A surprised wow works well before it when the plan is first revealed, building the sequence from shock to the question itself.
O tym dźwięku
This short Portuguese voice clip, lasting just over five seconds, asks 'Espere, que metas são essas?' in a puzzled, questioning tone. It sounds like a genuine double-take, half confused and half amused, perfect for reacting to a strange plan or an unexpected claim without saying much more.