[Incredibles 2] Whenever Voyd uses her portal powers, there is a noticeable echo as sounds travel through the portals and are heard a second time.

My 2 year old really loves watching the Incredibles, so I've seen these two films many times recently. I noticed this cool addition to the audio whenever Voyd (a superhero who can create portals) uses her powers.

Can be heard most clearly at 26 seconds when Dash runs through the portals.