Do you ever have days where you feel mentally high? (without intentional use of drugs)

I’ve asked my friends and family the same question more or less and of those responses it seems to be somewhat of an even divide between yes and no.

I definitely do experience these days. All my life I have sought to figure out what causes this, with very limited success. On these days I find myself much more adept at thinking critically, with heightened senses and reactions.

Does anyone else experience this? Have you figured out how to make it happen?