What is the most amazing baseball feats you have seen live on TV or in person?

The thing I saw live on TV that will never, ever (guaranteed) to happen again is when Fernando Tatis hit two grand slams in the same inning off the same pitcher. I had to pick my jaw off the floor when this feat was accomplished. The clip below shows what happened. Vin Scully's call is classic, of course:

http://mlb.mlb.com/video/play.jsp?content_id=14185449

The other feat I saw which made me laugh was Bengie Molina hitting for the cycle. This is the last person I would expect to hit for the cycle. Thank god for MLB Networks live look ins during the season:

http://mlb.mlb.com/video/play.jsp?content_id=9969169