The exact moment ZEXAL said "alright enough playing around, time to get serious up in here".
Swaggy motherfucker Kaito coming in with his best Kamen Rider Chronos impression, slowing time and whistling while he walks up to Yuma.
I mean damn this ass-beating had both Yuma and Astral shook which made the rematch at the end of season 1 all the more tense. While I personally enjoy Yuma's rivalry with Shark more than the Kaito one, Kaito is easily my favorite rival character from Yu-Gi-Oh!.