After many years of consideration, my favorite thing that Albert Pujols ever did was in this game on May 5th, 2008.
Tied 5-5 in the top of the 9th at the Rockies, Pujols had just doubled with one out and came into second with a noticeable limp. The next batter was Rick Ankiel who hit a routine ground ball to the second basemen to advance Pujols. Pujols, though, was running hard for home and managed to score from 2nd by the time the Rockies realized what he was up to for the go-ahead run.
Albert Pujols is a beautiful baseball player. It was a great privilege to watch him play in his prime.