Just watched the movie last night (was terrific, even though some of my friends complain that "nothing happens in that movie"), and was curious as to whether I was at that particular Astros game, so I did some digging. Turns out that this link indicates that the Astros game in the movie includes footage from two different Astros games, one where Clemens was pitching, and another from when Lane hit a 3 run shot. http://sports.yahoo.com/blogs/mlb-b...he--boyhood--characters-attend-164003306.html
