Can't see that anyone, especially a "professional bodyguard" would not notice they were "woozy" from that amount booze regardless of the delivery method. If he were an unexperienced teen ager, I could see him saying, "WTF, I will drive drunk, and at racing speeds".

But, it's hard to fathom that a professional, with such a valuable passemnger under his care, would have such "unprofessional" judgement.

And, there was another body guard to assist in the driving, and other options rather than starting off on such a foolish "dash" even if there was such urgency to make that deadly trip.