In Turin years ago at a conference, and I was sat in a group. There was this older professor there who was a great guy. The meal came and served with various drinks, and he told us all the order in which to drink them. "Always go up in alcohol level, never down". He was a local so we were happy to follow his lead in the food and drink stakes. So, as the meal went by I was getting utterly, utterly pished. Barely able to talk by the end of the meal. So much booze.
The next morning, I realised two things. This old professor was matching us drink for drink; and he drove us all back to our hotel in his car. Quite how he managed, I'll never know.