Jesus spiritual sepration from God was very impossible.Remember he was sent by THE ALMIGHTY  father and it is said in the bible that the father is in him and him in the father.but i have forgotten that book.

secondly his penality for sin was to save the whole world from death and this was from the father ,this phsical and emotional pain was to prove to people that in our preparation for and way in God's kingdom always there is pain at certain times but as believers and sons of God ,we should be prepared also to go through any kind of suffering as in accordance with God's kingdom.