Is this a normal temper tantrum of a 10 mth old?

I have a 10 mth old daughter...and her temper tantrums feel as if they're from a 5 year old!....When she starts crying and fussing to be held...or given food that's not for her like chocolate....or when she's just "p*ssed".....she starts flinging herself backwards on the couch or her high chair...starts grabbing her stuffed animals and hitting them together or flinging them around.....and it's kind of scary because she's only TEN MONTHS!?