For context: Sensei is about to target Infernity Launcher, but Rio's face makes Sensei target Infernity Inferno instead. Infernity Launcher is one of the most important cards in Infernity, so Sensei destroying it would ruin Rio's strategy.

Honestly, I at first thought it was a joke about how people used to play Infernity monsters in the Spell/Trap zone to cheat, and would scoop before they got caught.