Holly- G-Force

  Holly jerked the throttle, straight from fourth to reverse. Not very good for the gears. She'd get a dressing-down from the mechanics for that, in the unlikely event she actually survived this never-ending nightmare. The effect of this gear-crunching was to flip her around in mid-air, so that her boot heels were pointed directly at the troll's head.

  Holly winced. Two entanglements with the same troll. Unbelievable. Her heels caught the beast square on the crown of its head. At that speed, there was at least half a tonne of G-force behind the contact. Only the reinforced ribbing in her suit prevented Holly's leg bones from shattering. Even so, she heard her knee pop. The pain clawed its way to her forehead. Ruined her recovery manoeuvre too.

-Artemis Fowl, Chapter 8