Arcee is reasonable, but how in God's name is Flareup even moving?

Flareup is a Autobot. Her sisters are: Chromia and Arcee. She transforms into a purple MV Agusta F4. In Revenge of the Fallen, Flareup and her sisters chase Sideways down an alley in Shanghai. The sisters are later present in Egypt and are sent with Ironhide to recover Sam. The sisters are then hit by a large Decepticon, but Chromia is seen taking cover. It is said that they survived.