Strange Transmission Problem

Okay just to start I know it's not a normal trans with a fluid filled torque converter but it's still a trans. I got in the car today and had to move it a few feet and i put it in park and got out leaving the car on. Well just as I put it in park the motor started as normal, but it was at the exact same time as I was pushing P. The car rocked a little as normal but didn't give it a second thought. Got out, got back in selected D and when I stepped on the gas it was lagging, like a turbo motor would do. I thought it was just my imagination, then when stopped at the edge of the road to pull out and stepped on the gas again I knew something was definitely off. Acceleration was normal but when I let off the gas to maintain speed the motor RPM staid up. I mean the throttle wasn't stuck. The transmission released but the RPM staid up and I was getting 24 MPG leveled off at 55. I then let completely off the gas and put the car in N and the motor shutoff like normal and I turned on a side street and put it in P and turned the car off. Started up fine and drove like normal. I would also like to mention the battery had all of the blue bars on the battery, one down from green and no warning lights the entire time. I just don't know whether it was a fluke from me putting it in park like that or what.
Any Ideas would be greatly appreciated.

 

115,000 miles. I bought it with 107,000 on it. Trans fluid was changed at 100,000 according to records by the previous owner and The recall was done 5,000 ago. I haven't had the throttle body cleaned but like I said after the car was turn off and back on it was fine so it must of been a electrical glitch, but I would like to clean the throttle body. Is there directions somewhere in a thread for doing that.

 

Yes I could hear the fan and I guess that could be the problem but I don't know why. The car had been parked in the shade and the AC was on while I got out so it definitely wasn't hot in the car, but I guess anythings possible. I would think the car would act more like the battery was low like it had been sitting with the AC on for a while but like I said the battery was up where it normally is and it holding the RPM up seemed very strange and when I turned the car off and right back on it went back to normal.