Answer:
One am I, among six others: Largest, smallest, cold, dark and two brothers
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
Even if you throw it away, it still comes back.
If you blow past your destination, you'll have to throw your car into this.
What you become during a workout?
What sphinxes employ and players enjoy.