Were laws of nature different before sin?
Personally, I doubt it. I think a distinction needs to be made between the laws of nature, call them "Physics", and the spiritual laws which transcend human experience and understanding, call them "Religion". To say physics changed when sin entered the world doesn't make sense to me. Sin has little bearing on the microscopic workings of the universe. Indeed, most of it would work if we, humans, weren't here.
What happened when Jesus raised himself from the dead went beyond this. It was something so different, so radical, that it was practically unfathomable even to those closest to Jesus.
Jesus didn't just die and come back to life again, like Lazarus. His resurrection goes far beyond that. Laws far more important than those of physics were shattered and replaced. The change was so incomprehensible that the disciples themselves don't even recognise Jesus. He's changed beyond imagination, beyond recognition.
Jesus' death and resurrection changed EVERYTHING. It shook up the very concept of religion. It's wonderful, beautiful and awe inspiring, albeit confusing on occasion. All we can do, as humans, is praise God that it did happen, and that it happened for each one of us.
God Bless,
Nick