And it serves him right!
Drink it straight, right out of the jerry can boys.
I don't care for Glenfiddich myself - or at least any of the bottling I have been able to lay hands on. Good scotch is NEVER mixed. Not even water or ice. It should be served at room temperature, beside a brook or campfire, and be accompanied by a cigar of respectable make.
Dunno if that holds for bourbon but I handle that the same way and have never been disappointed.