Originally Posted by
Tiburon
Well, you had already had 2 sets in the book. All you needed was 5 more reps. Sometimes (actually, oftentimes) a failure is due to a temporary form breakdown. Maybe you didn't initiate good hip drive on that rep and couldn't get out of the hole. Or maybe your stance wasn't perfect. Or maybe the bar slipped a bit down your back. Or maybe you just lost concentration for a second.
Look: you're at the gym, you have your belt, you're warmed up, you're not injured, and you already have 2 of your 3 sets in the book. Why WOULDN'T you try again for the 3rd set? Now you gotta do 245x5x3 again next workout.