ouch.. looks nasty. surely you were travelling a bit too fast though?
I've damaged my parents car twice though.
First time was when I just got my restricted and didn't have my own car, so borrowed their car to go down to the river for a swim with my mates. Going down the track to the river I misjudged a gate which was pushed over and on the side of the track. Did a nice long nasty scratch/gouge from the front indicator right back until the petrol flap. Had the whole side panelbeated and repainted. Cost them about $1200.
Second time was a few years later. I needed to tow a car on an A-frame about 10km. My car didn't have a tow bar, but theirs did so I borrowed it once again. Car was hooked onto the A-frame fine and travelled about 8km without a hitch. Came around a sweeping righthander bend at maybe 25~30km/h and the buckle on the passenger side of the car being towed came free. The result was the car being towed wanted to go straight while the tow car wanted to go right. Ended up jack-knifing and the A-frame went under the tow car and came back up under the rear wheel arch. About $600 worth of damage there.
My brother backed into a 4 wheeler and smashed the tail light, wasn't a biggie so replaced the tail light, but a week later he backed into the corner of the hosue and smashed the same tail light, and did some decent damage to the boot and bumper