Well, my first time plowing the driveway of someone that I hadn't seen without snow, roughly 12" of snow on the ground. Driveway down a small hill, garage is straight ahead, turning left to bring the snow to the pile, and I see the door move. Sh*t, knocked it off the tracks. Finish up the rest, shovel in front, and tell the owner. Was charging her $70, so told her to keep it and we'd settle up after she had someone come look at it. That was Thursday evening. So today I get a call to come over. She informs me that there is damage to the corner of the house (siding trim edging cracked) and there is a gash in the door. I take a look, and I'll own the siding trim. But, I can't believe I didn't see the gash, since I looked at the door and shoveled in front of it after I knocked it off the tracks. I feel kinda screwed but with no picture I'm not sure what else to do. This person was referred to me by a friend who says she wouldn't try to screw someone but I feel I have no out. She had someone with a backhoe come and move some snow piles back, so how do I know it wasn't there back scoop that did it? The gash seems to be at an odd angle... thoughts?