Stand up with legs bent at right angles, put hands in front of you as if steering and say, "BAAARRROOOOOMMM!" Variation: Add, "Look at me go! BARRRROOOMM!!
Stand up with legs bent at right angles, put hands in front of you as if steering and say, "BAAARRROOOOOMMM!" Variation: Add, "Look at me go! BARRRROOOMM!!