Temper Tantrums....at 9 months?

I was truly amazed to find out on Monday from my mom, who watches Danica, that she had her first temper tantrum. WHAT? Yes, she wanted the box of kleenex, Grammy didn't want her to have the box of kleenex, so my angel decided to cry and even stomp her feet. I never knew there was potential for a temper tantrum so young. Maybe it was just a coincidence, let's hope it was just a coincidence--and blame it on teething. Isn't that what we are suppose to blame everything on?