Playoff baseball is one of the most intense things in all of sports, but for Chicago Cubs first baseman Anthony Rizzo and Washington Nationals outfielder Bryce Harper, they still know how to have a good time. 

In the first inning of Game 1 of the NLDS, Nationals infielder Daniel Murphy ripped a line drive at Rizzo, who caught it for the third out of the inning. Unsure of how many outs there were, Rizzo tossed the ball to second base to "double off" Harper. 

Knowing that Rizzo had forgotten the number of outs, Harper had a bit of fun at his expense: 

Knowing Rizzo, he cracked up at the gesture.