i did the same thing once. but it just scraped the lip really bad and scrached the bumper abit. didn't really do much damage. post pics of teh damage and we'll evaluate it more. did you rip off any of the mounting points.
yeah 3 of the parts on the bumper that bolt onto the chassis ripped, 2 on the top by the headlight and one in the wheel well by the corner lense. im gonna try bonding some washers to it and put it back on, right now im bumpreless. the rings ripped but theres none of it missing so it can probobally be fixed