Just Curious

I'm always baffled by a lone item of clothing abandoned by the side of the road, particularly when the one is clearly half of a pair.

Today, I saw a girl's mitten in the leaves alongside my running route. Did it fly from a car window? Fall out of a bag? Get ripped off and thrown to the ground in the midst of a tantrum? Is it missed?

Without fail, one shoe raises the most curiosity. Who loses a shoe and doesn't notice?