By Martin Naylor & Tim Hanlon A man who launched a vicious attack with a suspected pool ball inside a sock told a judge “thanks for ruining my life” when he was jailed. Jonathon Wood, 50, was seen hitting his victim over the head after first pulling the sock from a front pocket, in footage shown at Derby Crown Court. The man, who refused to support any prosecution, walked away with blood seen to pour from a wound on his head. After Wood said “thanks for ruining my life” when he was jailed for just over 18 months, Judge Martin Hurst responded “I think you will find it is you who has ruined your…