When Cosmo and Wanda are on the Fairy Dating Game, Cupid shoots Wanda in the mouth first with a plunger, and then with a scrub-brush. In the next scene immediately after Cupid shoots the scrub-brush into her mouth, Wanda is seen in the background with the plunger over her mouth again.
In Father Time, Timmy won the race his young father took, by using his heat vision he wished for early, to melt the contestants shoes. According to the fairy rules, their fairy godparents are not allowed to use their magic to make their godchild win competitions. Yet Timmy won a race, because he used something he wished for to cheat.