Audio problem: After Gru has unveiled his plan to steal the moon, he says,"That's what I'm talkin' 'bout!" The animation of his mouth, however, includes the unpronounced "a" in the word "about." (00:11:35)
Audio problem: After Gru declines Agnes holding his hand, he slams the door to his house shut. The sound of the door closing is out of sync with it.
Audio problem: In the scene where Gru grabs Edith while trying to get the girls to sleep, we can see Agnes laughing out loud while jumping on her bed, the sound of her laughter does not synchronize with her mouth.
Chosen answer: It is not very difficult to hold a straw between one's teeth, or gums and speak at the same time. A coworker of mine does it all the time with a pen.
MasterOfAll