Yea, Jerry was always so high that you would not notice it if he switched up a little on what he got there on.
I was backstage at the Capitol in Portchester in April or May of 1970, and the GD had enough beer to run a Walmart on a Friday night stacked up. I'm sure it was for the roadies, Weir was rumored to be in the upstairs room with a tank of NO at the time.
But over the years, Bobbie was always the one who was usually close to sober, and when you consider 150+ shows a year for 30-40 years, a couple of bad ones (and pain meds or muscle relaxers and alchohol can have some unpredicatable and heavy interactions) could lead to something like this. I doubt this would happen for more than one show in a row.
L13