I think Surfer's playing possum there, or at the least he's deliberately not making any effort to escape. I think that's why John's talking to him, trying to convince him of the righteousness of his actions.
Anyway, Nul needs to actually face off against some big hitters before we can truly see what is meant by the "strength of a God" stuff... after all Thor is a "god" too, and he's not even as strong as Savage Hulk.