Nothing... I can't drive the bloody thing.
What I did at the same time as hitting a rock with the sump (well... just after it anyway) was driving it on a dirt road (done many times before but previously always on semislicks) on normal tyres, hooked it around a tight left hander with some handbrake at the same speed I'd done before but it slid a tiny bit too far out and smacked the right rear wheel into the bank.
This was just after I'd heard something smack under the car on an uneven bit of road, but there was no knocking from the engine, pulled over just down the road, saw there was rocks and shit embedded between the wheel and tyre but didnt notice the wheel was in until I'd gotten it home. Noticed the knocking from the FJ when I pulled over to check the wheel, switched it off, checked under the car for oil leaks, checked the oil, put more in for good measure. No mobile reception, no houses, after midnight on a weekday... SH1T!!!!!! Decided if i could drive it at very low revs a max of a km I could get it to a position that I could probably roll it home, or at least push it as there would be no more uphill bits, so I did that. Knocking got a tiny bit louder for the short time it was running (figured if it was stuffed it would need a rebuild or replacement anyway...)
Got home, jacked it up to take the weight off the tyre as I felt it could go flat from an imperfect seal, had felt flattish rolling home, back was swinging a bit but didnt look like it had gone down much. I didnt want to bend the rim of the Watanabe so I stuck an Enkei on the next day, noticed the wheel was sitting in a bit on an angle but thought some might have been from jacking the car up, rolled it up and down the driveway a bit to try and get it to settle but it didnt do terribly much.
Then I rolled it into the shed and forgot about the car until I went to get something from the shed the other day.
So I've bent something..... just dont know what it is yet
Only time I've ever hit anything btw... and I wasnt going quick at all, just like using the momentum of the car to bring the back out a bit on that corner, the dirt road is a bit of a shortcut between two good roads in the hills