Lance's picture on his driver's license. Awkward doesn't even begin to describe it. Poor guy can't crank a smile to save his life (sans episode four, that is).
Octus' pure child-like joy at eating ice sticks.
He and Lance were making a model car out of popsicle sticks. When the rival racer destroyed it, Octus revealed he had a holographic model the whole time. When Lance asked why he didn't show it sooner, Octus' answer was priceless.
Octus' interaction with Meat the Jock. Those two could have a comedy routine.
The scene where Octus just casually holds up a jar contining the Monster of the Week to Meat's cell phone (which causes the monster pain) and the pulling it away again as an oblivious Meat continues with the conversation.
The conversation itself is just as brilliant.
"Mom? Can you come and get me? It's weird in here!"
Octus' face during the dance scene where Kimmy attempts to "Booty Quake" her way into getting him to do her homework for her. And his reaction.