If I see an American with a vest of any sort jogging on your Memorial Day, I am betting my boots he's doing a Murph.
Edit: having said that, OP has mentioned that jogger-in-question is ex-pat Detroiter. Probably wears vest to bed.
Edit: having said that, OP has mentioned that jogger-in-question is ex-pat Detroiter. Probably wears vest to bed.