Use 'apoplectic' to describe an extreme level of anger that is almost out of control. He was apoplectic with fury after the verdict.
Pro Tip 2/3
Visual Imagery
'Apoplectic' often evokes an image of someone red-faced and possibly shaking with anger. The manager became apoplectic when the referee made a poor call.
Pro Tip 3/3
Collocation Clues
Pay attention to collocations. 'Apoplectic with rage' is a common pairing you'll encounter. The boss was apoplectic with rage at the loss of data.