Starter keeps turning
 

I just went out to move the girl and when I turned the key in the ignition to start it the truck started but the starter motor kept on going. I turned the key to the off position and the starter kept turning trying to start the truck. I had to pull the ground from the battery to get it to stop. What is the problem here? Solenoid hopefully, starter hopefully not? Help please.:-arrgh

Wow I just realised there is another thread right above mine with the same issue.