/>Starting at 10:00 am on November 21, David Blaine will once again attempt to wriggle his way out of an impossible-to-escape confinementbut this time, it's for a worthy cause. Target and BBDO/N.Y. are organizing the stunt, in which the magician/performer is strapped to a spinning three-ringed gyroscope 40 feet above Times Square in New York City, to benefit The Salvation Army and 100 needy children and families. If Blaine can bust loose in time for Target's 2-Day Thanksgiving Sale starting on November 24websurfers can check a countdown clock, download a widget and watch webcam footage of the escape-in-progress at an Atmosphere BBDO-designed sitethe kids get a holiday shopping spree at Target.