Originally posted by Allankles
I think it was more a case of becoming one with the power. He overrode all the mental blocks that were keeping from assimilating the power.

In fact it was the reverse of being overloaded, he was actually holding back the power initially (which was hurting him). Then we see him let go. No Father. No Lois. No Pain. No heart. Just power. We see him realize the power is all he needs to focus on.

It was a question of focus, he was initially focusing on everything but the power, once he put the power in perspective all was peachy and he completed the transformation.

Yes, because he was struggling with all the power and the emotions of what he'd been through.