One is the "shit happens" moment, when a guy makes a freak play that he couldn't duplicate if you gave him 100 more chances. Nick Stavinoha's one-legged, crouching seven-iron against Trevor Hoffman on Friday certainly qualifies as a "shit happens" moment.
The other type of moment is the "oh, shit" moment. For all intents and purposes, this is the exact opposite of the "shit happens" moment: it's not at all fluky. You can see it coming from a mile away. The back-to-back tape measure jobs that The Hoff gave up to Albert Pujols and Matt Holliday last night qualify as "oh, shit" moments: when you saw that Hoffman was throwing 90% fastballs, and that said fastballs weren't breaking 84 mph, all you could do was cross your fingers and hope that Pujols and Holliday would get over-anxious. But they didn't, and those fastballs went where they're supposed to go, which is to say: BYE BYE.
So far, Trevor's had two "shit" moments on the year. I hope he's getting that shit out of his system right quick, because I'm not suffering through Gagne 2.0.