Tolstoy took the subjectivist conception of reality to literal physical experiment.

Evidence

Thus it is worth recalling what Tolstoy writes in his Memoirs of Childhood, Boyhood and Youth. He writes there that he became so enthused with the subjectivist conception of reality that he often used to make himself dizzy with suddenly turning faceabout, convinced that he could thus capture the moment in which he would see nothing because his spirit would not have had time to “create” reality (or something of the kind: the passage of Tolstoy is characteristic and of great literary interest). — Antonio Gramsci, Selections from the Prison Notebooks, 1573

Categorization

• CANDY: A charming anecdote: the great novelist spinning himself dizzy to catch reality uncreated by his spirit — fun concrete illustration of an otherwise abstract philosophical position.