Photo by Chris Rief aka Spodie Odie.Hoo, boy — if you thought that it had already been a laborious weekend for Metro, you ain’t seen nothing yet. WMATA isn’t taking too kindly to the Post’s big report this morning, an expose about the previous failures of Metrorail’s much-maligned crash avoidance system. The Post’s report leads with a terrifying story about a 2005 incident in which not two, but three trains’ avoidance systems failed, and…