devtrackers.gg
Um ackshually he doesn't predict the Flash Taunt.
He Flashed because he was going to get hit by the normal taunt. He was well within range of the taunt-flash before he ever flashed away.
He did predict the taunt. You saw him run backwards early. But he was gonna get hit my the flash if Shen wanted to spend it proactively.
Edit: and if we're being nit-picky, he whiffs his first auto after the knockup. He Qs too early.