The physical pain on the cross was, as unimaginable as it may be for us humans, the easiest thing Jesus did for us.
Before He ever got to the cross, He had to walk, as a human, a totally perfect life and never sin, despite "being tempted in all respects" as we are. How hard is that? Day after day, year after year, to always make the right decision, to always deny self. Satan's petty temptations were probably nothing to Him by the time He got to that point, having "seen it all."
More amazing is the spiritual death He died in the Garden and the sin of the world that He took upon Himself. For One who "knew not sin" to be "made sin for us" had to be a far greater pain and involve far more suffering than even the torture of the cross.
What really ought to get Christians is that what they see on screen is the EASY part of what Jesus did. Think about that!
On the cross He cried, "My God, My God, why hast Thou forsaken Me."
That, to me was the ultimate sacrifice. To be forsaken of the Father, for me, so that I would not have to be forsaken.