When Pim (as Phil) goes to give Phil (as Pim) a high five, near the beginning of the episode, he lifts his left hand up. However when the angle switches he has his right hand up. See more
And here I was making you look so good in science class. So good, in fact, that you're the new captain of the junior science squad.
What?!...I...I can't believe...why don't you just make me the grand marshal of the dweebedy-do-dah parade?!