I'm guessing the passenger farted...
That was a good theory Pesky but I'm convinced now that it was the paperboy. He drove by again early this morning with the passenger door open and threw out a paper to the neighbor across the street.
I'm not sure why he had both doors open the other day. Guess he didn't want turn around and come back down the block so was throwing papers out on both sides of the street in one pass.
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