Continuity mistake: After the Hadouken-spear struggle, Scorpion teleports behind Ryu and sucker-punches him in the head, which sends Ryu just a couple of steps forward. After Scorpion takes his sword, Ryu has suddenly teleported further away, requiring Scorpion to charge at him to reach him.
Samurai Jack VS Afro Samurai - S5-E9
Continuity mistake: After jumping right behind Jack, Afro attempts to stab him, and Jack avoids it. When Jack turns back to face Afro, it looks like there is a bit of distance between them, despite Afro being right behind Jack in the exact previous shot.
Nightwing VS Daredevil (DC VS Marvel) - S5-E12
Daredevil: I wish I could see the look on your face.
Nightwing: Me too. (00:17:15)
Trivia: When Scorpion catches Ryu's fist, we get the first 2 hand-drawn shots in the history of the show. (00:12:00)