It's difficult to say: I think shortly after this "incident", I started doing more maths/physics on my free time, which must have help this boost to persist. T

It's difficult to say: I think shortly after this "incident", I started doing more maths/physics on my free time, which must have help this boost to persist. Thinking about it, this recalls me of a Leonardo quote (pertaining visual memory then): > « I myself have proved it to be of no small use, when in bed in the dark, to recall in fancy the external details of forms previously studied, or other noteworthy things conceived by subtle speculation; and this is certainly an admirable exercise, and useful for impressing things on the memory. » I remember reading about similar observations regarding visual memory, where students trained to memorize visual information would outperform their peers (observations perhaps in the 1800s/early 1900s, IIRC a woman was in charge of this).