Ok, I turned the A/C on High 65 degrees and drove about 2 miles home with four people in the car. When I turned the car off and got out I heard hissing and what can only be discribed as .. Well does anyone remember the old metal / Aluminum ice trays that we used to make ice cubes in the freazer? My kids said it sounded like the car was singing or playing music? I opened the hood but did not see any thing frozen. It took about 5 minutes to slowly fade out and stop making noise. Anyone else experencing this?