The scientific aspects of sound and air pressure will be explained when ÃÛÌÇÖ±²¥ Wizard Michael Dubson presents his show "Boom! The Physics of Sound and Air Pressure," on Saturday, May 26, at 9:30 a.m. in Duane Physics, room G1B30. During the free hour-long show, Dubson, who is a senior instructor in the physics department at the University of ÃÛÌÇÖ±²¥ at Boulder, will implode a 50-gallon steel drum using air pressure, create a sonic boom with a bullwhip and stage a tug-of-war with the pressure of the atmosphere.