Knitting Lifeline!

So, I'm trying a new sock pattern, which seems to be knitting up pretty easily. I knit the cuff and the first repeat of the leg pattern (12 rounds) and debated putting in a "lifeline". Thought I wouldn't need it because the pattern was working up so easily, but put it in anyway. Well, you've guessed it. I just took out 10 rounds of the second repeat of the leg pattern. Good thing I had the lifeline in there, or I would have just frogged the whole thing and started over. Whew. TGFL! (thank goodness for lifelines)