In a perfect world.
My buddy was blowing using a big 2 stage on an interlock brick driveway. The driveway had heaved slightly during winter. The scraper on the blower caught the raised edge of an interlocking brick, popping it right out of the driveway. Of course, the brick got sucked into the machine jamming the auger and snapping the shear bolts. Even though the shear bolt did break, the auger, the blower housing and even the auger shaft all bent. It took about a month to fix the damage.