Its been about 3 month since my surgery and things seem to be going on track. But today I was laying on the couch with my lower legs hanging off the edge, when my daughter started crying. So I quickly got up not realizing that my knee was asleep. I got up and ended up putting all the weight on my right leg (recent acl), which ended up giving out and myself falling straight down on my knee. Mind you I don't have full range of motion yet. When my knee bent all the way down to full compression I heard a pop. It did hurt, just sounded like all the other pops I've been having lately, doc said it was due to scar tissue. After about 30 min the back of my knee started hurting. What kind of damage could have happened from a fall like this?....like I said I feel straight down, I didn't twist my knee. I would call my doc but its the weekend so getting a hold of him is going to be a but hard, and its late at night.