Facing a truly difficult circumstance, ..facing separation from His Father.
Matthew Chapter 26
53 | Or thinkest thou that I cannot beseech my Father, and he shall even now send me more than twelve legions of angels? |
He could have asked His Father and gotten totally clear of the 'circumstance', but He chose to let things take their course.
I believe the cup was death:
Hebrews Chapter 5
7 | Who in the days of his flesh, having offered up prayers and supplications with strong crying and tears unto him that was able to save him from death, and having been heard for his godly fear, |
His Father heard His supplication and saved Him from death; He raised Him from the dead.