so as it turns out my son has really messed up his knee big time . it may never be the same .he is looking at almost complete reconstruction of his ligaments and tendons . he tore his ACL, meniscus, his medial lateral something or other ,and some other tendon. what was not torn was pulled and sprained. he has massive bone bruising do to the tears and unstable knee. do to the huge amount swelling the surgeon cant touch it . so he has to go to PT now to get the swelling down and get the knee in shape for surgery. he is looking at surgery in september. after that he has a 9 to 12 month recovery time .