Philosophía
"The devil made me do it"
Superman.
And him lifting infinite weight - which he did, as there's no proof within the story context or actual direct statement to say otherwise - quite the contrary - is valid, no matter how much sadness it provokes to the haters. In fact, that whole story was about Superman being the ultimate hero and doing impossible things, such as, at the end of the story, being capable of containing the bleed when nobody except the Monitors, who are writer analogues, should be able to.
"They were wrong. Superman can."
As for the thread, Superman, definitley.