Twitcher and judderer (2)

Have you ever played OTB game with coffee shop player, who was just about to open Pawn race and is hoping to get there before you, but he is so excited that he judder the table and twitches with his legs, he leaned over the table so that you are not able to see half of it, and he champs and munches and even croons something in sheer joy of win coming to fall onto his lap.
And you see he will lose, it's only an optical illusion...
But you still want to calculate some options.

Nope, can't say as I have.