TL;DW: Mario blinks at a set interval even after level loads to prove legendary Japanese speedrunner of old, who even had a timing sequence named after him, of cheating by splicing. Even in the run that gave him his fame.

Quite interesting video showing different ways people can prove a run is spliced.

Here is an alternative Piped link(s):

https://piped.video/watch?v=dockhgV__pE

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