Stage One: Man, it smells musty in here. I must have spilled water on the floormat. Need to air the car out.Stage Two: What IS that smell? That's not good. Did I leave a dirty diaper in the diaper bag in the trunk? Stage Three: OMG, where is the dead mouse? I don't see it but I know — for sure — something died in here. Where is it -- WAIT A SECOND... Stage Four: Oh. A container of uneaten broccoli from Milo's lunch from last week. Egghcckk.