A guy went swimming in the Gulf of Mexico over the Memorial Day weekend and his $30,000 prosthetic leg . . . featuring a big Kentucky Wildcats logo on it . . . fell off.  On Thursday, after more than a week and a half, a shrimp fisherman found it floating in the water.  He brought it on board and was able to use the logo to help track down the owner, who's going to pick it up today.