MJ Blows a Q18 to Bursting (MP4 - 720p)

Description: Mj is new to destructive testing at the lab, but digs into her assignment with gusto.  she takes enormous breaths pushes them quickly into the balloon, and then repeats the process immediately.  she is obviously in great physical shape, and knows her body well enough to approach her limits without endangering herself.  truly a model experimenter!