In 2004, a former girlfriend and I got SRO tickets at Wrigley field to watch a Cubs-Rockies game. The Rockies pitcher was really struggling, but Greg Maddux (for the cubs) was also having an uncharacteristically shaky day.
With the score tied 3-3 in the fifth, the Rockies pitcher leaned in and sent a Maddux breaking ball over the right field fence. He was so jacked from this, that he came in the next inning and struck out the side.
It was only ten years later that I learned that this was the only time Maddux ever surrendered a homerun to an opposing pitcher.
As far as the former girlfriend, well, she wasn't interested in getting back together.