Infinite Crisis #4 spoilers behind cut
Having a Silver Age icon decapitate, dismember, flash-fry and punch holes in other heroes is not a light touch, nor is having said icon kick the crap out of a dog. Just for reference.
While I'm sure this will all be explained as either "Earth-1's influence on Superboy" or "Luthor's influence on Superboy" by the end of the story, it's still a bad call. This is just kinda distasteful, and I think it could have been handled better.
That said, Superboy's a shoe-in for the gold in the '08 Olympics' Krypto Toss.