This is for completing the quick time sequence without missing a single prompt near the end of Episode 2 and is obtained shortly after the unmissable "I heard that."
It begins after you watch them put the chemical solution in the dino's water. You'll be attacked while fixing the dino's toe and have to run to your daughter and the other doc. If you miss one just hit start and load. As long as the emblem in the top right is gold you'll get the achievement.