I have an older (late 80's) bobcat 743. Been fine for the last few days and then today the battery was low. I charged it up and started it. Went to the lift the bucket and it was almost non responsive to the controls; both raising the arms and tilting the bucket. Did move some but very slowly and sporadic. It was hard to check the hydraulic fluid as the arm stopped right in front of the cap. I left the machine running to charge up the battery for a while. About 15 minutes later one of my guys tells me no one was near it and they looked over and the arms were fully raised. I got in and tried to lower the arms but again, they were non responsive. I shut it off and left it with the arms fully raised as it was the end of the day and we were getting ready to leave. Just before we left we looked and the arms had fully lowered while the machine was off and no one was near it. Is it possessed?