It's hard to explain what happened tonight!  A horrible sound just went across our whole house.  Loud! I felt it through the couch I was sitting on. Went downstairs to find the kids looking in the heater furnace room. We are pretty sure it was pipes..loud!  So we checked our faucets and toilets. The toilets blew back air. We looked up why the toilets would do this. Said that there could be a blockage..or a vent on the roof is blocked.  We will call a plumber in the morning. I got hold of the guy that did our roof. Asked if he could come check the vents up there. He'll be by at 9 to check things out up there.  He's the boss.   He asked if we were OK. Yes, just scared us half to death. Poor Ashton got uo scared. I mean it rattled those pipes. Air we're guessing.  Austin went outside to check the meter to make sure the dial wasn't spinning, meaning a busted pipes. It was fine. No more noise. Oh boy. Yes we got a warranty on the sale.