alissa sizemore , from vernal , utah , was only seven-years-old when a truck ran over her foot and immediately severed it .
although the dancer , who has been taking lessons since she was four-years-old , had to have her right leg amputated below the knee , she was determined to get back in the dance studio as soon as possible .
` i just did n't want to give up , ' alissa told people .
` dancing has been my favorite thing since i was four .