The Classic Tetris World Championship took place over the weekend at the Portland Retro Gaming Expo and those in attendance witnessed a shocking defeat with the championship on the line.

In the final battle of the weekend, 7-time champion Jonas Neubaeuer went up against 16-year-old prodigy Joseph Saelee and it was the wunderkind who came out on top.

Not only did the teenager defeat a 7-time champion in Neubaeuer, but he also put an end to his three-year run as the competition’s champion by defeating him with three straight victories in the best-of-five series.

“I don’t know how to feel, I’m still recovering," Saelee told IGN. “It’s absolutely a dream. I came into this tournament just to qualify, just to meet all these great people, and to win, that’s just amazing. I don’t know what to say.”