A wild time on the bike trail

It's been many years, but I have been to a party where I came home without my shoes.  Actually, the party was in the house where I lived, but somehow my favorite Top-siders were gone as the fog cleared the next day, and were never seen again.  That, evidently, was a pretty good party.

But I think the poster of this sign has one over on me.

The sign is posted where the bike trail meets the parking lot of a newish and very nice hotel, so it's not entirely clear where the individual was parted from his/her shoe and leg brace.  My first thought was of a rustic soiree along the river, but perhaps it was an indoor occasion, where the evening's dancing required one to be unencumbered by footwear -- or, in this case, half of one's footwear.

To make things more interesting, there's no getting around the fact that the sign implies the two missing items are a united pair.  To me, the sign quite clearly does not say, "I lost my shoe, dammit.  And, come to think of it, I have also lost, quite by coincidence, a leg brace."

No, to me the sign says, "I lost my shoe/leg brace combination.  No room here to explain, but I really, really need it back."

All of this leads me to the conclusion that the lost item is basically a prosthesis.  And while losing one has got to be a huge downer, the circumstances under which this would happen could well make you the envy of partiers everywhere.