This one is easy.
May 12, 1970 Wrigley Field, Chicago. Braves vs. Cubs.
Pat Jarvis serves up Ernie's 500th home run. I'm in the left field bleachers. The ball comes zooming toward me but the guy in front of me has the chance. Ball bounces off his hands back onto the field. Rico Carty picks up the ball and runs it in to give to Ernie.
It was a chilly, misty day, attendance 5,246 though I'm sure you'd find 20,000fans in Chicago who would claim to have been there. Me, I can prove it as I got my picture in next days paper.