well, i fell down a step at school and felt my knee crack and was automatically in horrible pain. i thought i retore my ACL. it is swollen but not tremedously. i was by myself, but was able to get to class and get help. i went to see my therpaist and he did the tests and said that my ACL was still in tact! He said that my muscle that connects to my knee might have torn off the knee or tore my meniscus, but he thinks i probably just strained that muscle. see the surgeon tomorrow and will see what he says. just glad it't not my ACL again. this is a set back but hopefully not too big of one.