So, there is some clinical credibility to a memory of an event that is experienced while you are under the influence of an intoxicant, which can best be recalled when you are intoxicated. Interesting.If you haven't done so, look into the concept of 'state-specific memory.'
What started my pondering was all of the razor sharp memories guys claim in various threads here, where they can recall the look, smell, taste, and quality of a strain that they had once in 1983 etc. While one can accurately point at state-dependent memory as proof it is possible, I still think that there is a huge amount of I-can-pee-further enhancement occurring as well. And you have to factor in the time and place enhancement that can occur when you get higher than you normally would be because you are in a situation when you shouldn't be. Like that time in Grade 10 Chemistry class when Jim and I smoked that bag weed on lunch break . . .
I will admit that my memory tends to be only good to average for most things but freakishly good when it comes to places. I have been called a human gps more than once in my life.