lost a part last night

I was doing the front axle seals on a 95 Ford 4x4, and found a half inch socket underneath the axle shaft u joint.

Also had the spare tire come off from underneath that same truck on the highway. Driving along, I look out the drivers window, and see my spare tire literally bouncing/rolling along beside my truck. The metal bar that holds it up had fallen off, never did find it.