Student or Learner
"Unlike Dancer, whose instant flare-ups diminished just as quickly, Jack Lee fought the loss of control because his fury, once vented, took a long time to subdue; and anger clouded his thinking. Away from the cause the symptoms were easier to alleviate, so he took himself out of the danger zone and found a quiet place in his subconscious for a few minutes."
Is it just saying he wants to cool his head?
Then again, "to cool his head" may be exactly right. Or, as we might say, "Get a grip on yourself, Jack!"