While staging at a Brush Fire in Calvert County Engine 74 was requested to handle a Landing Zone in the Chesapeake Ranch Estates. Engine 74 responded to set up the Landing Zone for Trooper 4 for a child who fell off a trampoline. Engine 74 was on the call for approximately 30 minutes before clearing and returning to quarters. The child was transported to the trauma center for evaluation. Engine 74 cleared the call at 1359 hours.