Place it at the end of the build-up, just before the action starts, then follow it with the Game Show Buzzer for a false start or the Run Vine clip as everyone scatters. Keep it as the last cue in the sequence so the next sound carries the reaction.
Über diesen Sound
This is a short French voice line, about six seconds long, in which Dupond declares 'Je fais feu' in a firm, deliberate tone. It feels tense and theatrical, like a command given just before the action starts, with a comic edge from how seriously it is delivered.