Like Tripage is saying, I hope it was collant in the drain pan and not a cracked head or block from the crash. Keep a VERY close eye on your oil. If you change the oil and see foam, grey oil, or white smoke out of the exhaust, you have a serious problem. If any of these symptoms comes true after you change the oil you'll need to run a compression test on the cylinders and a leak down test on the radiator. Don't continue to run the bike if you are mixing oil and water. Watch your temperature gauge also.
^^ EXACTLY. check these things out for you might have a big problem on your hands. Some oils appear to have a slightly green layer on top sometimes tho when you look at the right angle. If you do see foamy oil, white smoke and/or a distinct burnt smell when the oil cap is pulled off you may also have blown your head gasket ... you need to really look into this problem.