perhaps ’hipflask’? Alternatively, ’a sip of his pocket whiskey’
I would break this into two sentences. ’He grabbed Saul’s hair........’ and ’I suppose he wanted to make..........’
He grabbed Saul’s hair and yanked it tight to make sure it was on there I suppose.
Its nice that there’s a storm and it just makes me wonder about his efforts to stay quiet in the first paragraph.......
"Ain’t nobody gon’ hear you over that storm outside!"