Video: Inflatable air bladder bursts under weight of 700,000-pound tree stalling $400k move at U-M | MLive.com:"A large, rubber air bladder holding up a 700,000-pound bur oak tree burst Sunday afternoon as construction crews from Environmental Design and Walbridge were attempting to complete the 100 yard move of the 250-year-old tree at the Ross Business School complex on the University of Michigan's campus."
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