The original Superman movie was on a movie channel a week ago and I watched some of it.
At the beginning when the parents are pulling crystals and putting him as a baby in the pod to evacuate him, I think the dad pulls a green crystal to give him. That wasnt kryptonite was it? Should had killed him as a baby in the pod. If it wasnt then it was confusing to make a good green crystal too.
Also, totally forgot about him as a high schooler running weird. I guess they couldnt figure out how to make the guy run like a normal person during those super sprints.