The Reds play the Pirates in the NL wild-card game tonight, and while it's been forever-and-a-half since the Pirates last made the postseason, the two teams actually have quite a history with one another. And because I'm a Yinzer dork who can barely sit still in anticipation—hurry up, eight o'clock!—I started sifting through some of that history. I found the video you see above. But more on that in a bit.
The Bucs and Reds met in the pre-wild-card-era NLCS five times: 1970, 1972, 1975, 1979, and 1990. The Reds won all of them except '79. Without question, the play that stands out the most from those series was Bob Moose's wild pitch, which decided Game 5 and sent the Reds to the World Series in '72. It also turned out to be Roberto Clemente's last game; he would die in a plane crash two months later.
But because MLB hates you, video of Moose's wild pitch doesn't exist on the internet. [Update: I stand corrected. Here it is.] So let's look at 1990, when the Reds beat the Pirates in six games. The Pirates won Game 1, but the series shifted when Andy Van Slyke tried to advance from second to third on a Barry Bonds flyout in the sixth inning, only to get gunned down by Paul O'Neill, who also drove in both of Cincinnati's runs that day. The Reds would win three straight games before the Pirates beat them in Game 5 to send the series back to the Queen City. Which brings us to the video you see above.