Wow. Yeah, you got off easy.
My step dad, i let him take my bike around the block 8 days after I bought it. He somehow managed to wreck at about 10 MPH, and scraped the front of a car. Seriously, no exaggeration here at all....
Right around $3000 for repairs, and he snapped his shoulder blade clean in half, plus still has a scar on his leg from the pipe, where it burned him.. bad.
PLUS three weeks with no bike. He paid for the repairs, thank god, cause my insurance would have dropped me, seeing as how the bike was close to being totaled within eight days of owning it.
Lucky my buddy is a painter, we got the bumper on the car he hit fixed for free.
Anyways, yeah man. These guys are right. Just make damn sure that there are no mechanical problems hiding. If your crusing and something happens with the engine or wheels or something like that, well, looks like another wreck.
IF you can swing it, it MIGHT be a good idea to have a mechanic just look at it for you. Just incase. But thats me, and when it comes to that kinda stuff, im paranoid.
P.S. track that dog down, and kill it.