After thinking it over, I'm ok with Medlock and his performance tonight. I wasn't expecting him to hit the 56 yarder, he sent his lone <50 yard field goal straight down the middle of the uprights, and he just happened to hook his 50 yard kick. He probably spooked himself a bit on the potential game winner, no doubt, but the Pittsburgh field is also NOTORIOUSLY tough for even veteran kickers (hell, you could see how the field was getting torn up just by players who going low to the field for catches). It's just very, very difficult to hit 50+ yard field goals in Heinz Field.
In fact, if Medlock had hit that 50 yarder, he would have tied the RECORD long by an NFL kicker!
So Medlock will be fine, just fine.