Can you eject from a plane on the ground?

The short answer to your question is yes. Some fighter jets like the F-18 have the capability to eject at 0/0 (the first 0 being speed and the second being altitude). The effect of the seat being ejected doesn’t hinder the ability for the jet to be used again.

Can a pilot fly again after ejection?

Yes, and they often do. I flew with a guy who had ejected from 6 different aircraft, one of every type of aircraft he flew in the Air Force. He was quite short and would joke that he used to be tall but he lost 1 inch of height from spinal compression during each ejection.

Why do pilots need to eject out of the cockpit?

There are many instances where pilots need to eject out of the cockpit due to emergency situations, and after such an ejection from some modern aircraft, pilots are deemed unfit to fly airplanes for some years. Why is this done? What is the minimum number of years after which a pilot is deemed fit to fly again?

What happens if a pilot gets hit by an airplane chute?

Bruising and abrasions are typical from the shock of the chute opening or the air blast. In the early days, there were cases where pilots would eject into very-high-speed air and it would whip their arms behind and break them, pop their shoulders out; same thing could happen to the legs. Source

What are the possible injuries of ejection from a plane?

Firing of ejection gun: spinal injuries. Entering airflow: wind blast may cause lung damage; seat tumbles at variable speed, which may be as high as 180 rpm. (All seats have a drogue parachute or deployable aerodynamic panels to prevent tumbling); flail injuries to extremities. Parachute deployment: snatch injuries. Landing: lower limb injuries.

Why do pilots wear their visors down when ejecting?

For these reasons, aircrew are always advised to wear their visors down, to protect the face. Firing of ejection gun: spinal injuries. Entering airflow: wind blast may cause lung damage; seat tumbles at variable speed, which may be as high as 180 rpm.