I'd venture to say that after their night of drinking, both had whopping hangovers. Ennis looked a bit nauseous to me. So, they might have had upset stomachs. Plus, I think they were in states of semi-shock. When Ennis woke up, he seemed to be thinking WTF? did that really happen? I'm sure both of their stomachs were in knots wondering what to do next. I think Jack would have been happy to fix Ennis some breakfeast if Ennis hadn't have taken off. But Jack probably knew Ennis needed some space and time to think. But, I'm sure they made up for it after SNIT. Bet they built up some big appetites after that night! :o