The Falk Corporation explosion refers to a large and fatal propane gas explosion at a Falk Corporation building in the industrial Menomonee River Valley neighborhood of Milwaukee, Wisconsin, USA, on December 6, 2006. Three people were killed and forty-seven others injured. Cars were reportedly flipped through the air and debris scattered over several blocks. An investigation of the cause of the disaster uncovered leaks in a pipe running below the building, which supplied propane to the heating system for the complex. Several parties involved in the explosion have launched legal action in connection to the accident.