I guess I felt like as a second-time mom, I shouldn't be afraid of something as "armless" as cutting her nails. Was I ever wrong!
My mom came in right after it happened, along with my husband and my other daughter. They all said "What did you do!?" I felt so terrible (and still do). I get woozy just thinking about her screams and the blood.
I'll stick with the file or biting until she's older.