Monster performance from Marin and Afreeca Freecs to take down SKT. SKT showed some weakness in those two games, where they couldn't get big leads in lane phase, allowed AFs to pull some sneaky baron plays on them and kite back from their squishy assassins and dive attempts. With much more aggressive players than usual at both top and jungle compared to the incredible SKT teams in 2013, '15 and '16 they might have more difficulties in the closer games where they'd normally rely on superior macro and team comps to win. Peanut was reduced to fairly desperate engage attempts on Rengar as neither he nor Huni could bully Spirit or Marin during lane phase.
Level of play was generally exceptional though - Kuro and Kramer both played much better than their usual and Marin was simply godly in both games. SKT made several poor mistakes in game 2, as if they were rocked a little by the challenge.