Went into the garage to drop some stuff on the work bench, turned to walk out the door and just as I was exiting, out of the corner of my eye I noticed something on the trunk lid. Realizing it was drywall(sheetrock) I looked up at the ceiling thinking something came down but no. The wall mount door roll up spring let go and unwound the spring beating up the drywall.
Stood there with my jaw on the floor in silence,,, for a second then went into a 4 letter word torrent! took these pics and slammed the Fn door on the way out. I'll check for damage tomorrow.
That sheet rock just doesn't seem to hold those screws. joking! But anyway,just got done fixing the son's door.New house,the screws pulled out on the spring and the opener.The contractor sunk the screws in to sheet rock and insulation.
Of course, the problem is if it's a double door, especially a wooden one, whatever's in the garage is going to STAY in the garage until you fix it. Those doors are heavy without some spring help! Only had the car stuck inside one time. The other two times, I couldn't get it in, which left more room to work on it. There are many things I'd rather do, too, than torque those springs. 
After the third one, a guy told me they break because of friction between the coils, if not maintained. He said once a year I needed to run a thin trail of oil from an oil can across the top of the spring and let it sit for a few minutes before wiping off any excess. That lubricates the coils as they slide past each other. No trouble since I've been doing that, though it's only been about five years. Time will tell.
