I did the same exact thing wakeskating landed with front foot on and back foot off, hyper-extended streched out and acutely tore my ACL, had ACL reconstuction done using a hamstring graft on May 25 04 and now I'm spending 3 days a week chillin with the PT guys at Health South. Good times, good times. Actually tho, I'm prolly the only one, but I LOVE PT, I think it may be because my PT guy is like my hero at the moment but s'all good.