If this is sewage back-up, take note then of the guy trying to move the ejected object from in front of his car when it goes off again.

Traffic Camera Catches Explosive Storm Sewer Flooding. Footage from MN DOT traffic camera video from 35th Street and Interstate 35W of the storm sewer during heavy rain. The heavy rain trapped air in the drain system causing it to push the water back up the storm sewer system and exploding straight up in the air like a geysers.