2002 f150 linkage problems

I was down at the boat ramp and put my 2002 f150 in park. I got out of the truck and it took off into the ocean. Turns out the bolt on the linkage had fallen off causing the vehicle to slip into drive. Has anyone else had linkage problems with their 02 f150? Please help!!

Holy crap, sorry to hear the bad new, afraid I can be of no help to you. But my appologies.
Jake