Truck Air Brakes: Listen & Download Truck Air Brakes .mp3 Error! Change your browser, please! ⇓ Download Air flow ⚠ Helium balloon ⚠ Wind tunnel ventilation ⚠ Balloon inflating ⚠ Cut through the air with a gas burner ⚠ Truck Air Brakes ⚠ A stream of air breaks out of a metal pipe ⚠ Steam ⚠ Air pressure ⚠ Soccer ball ⚠ Air is bleeding through a hose ⚠ Balloon descent ⚠ ★★★★★