I've never watched any previous episodes, but I watched episode 6 out of curiosity and I loved it. I couldn't stop laughing. xD The animation is great, too.
Me and my lack of imagination thought that Al was going to say his original line "no fair, sky, I'm the one who feels like crying" so when I heard instead "no fair, sky, I'm the one who's retarded
" (spoiler tagged so people like me can still be caught off guard!) I totally laughed my head off.
And it's probably just me, but whoever does Ed's voice kind of sounds like he's doing a cross between a Trunks and a (male) Marge Simpson impression. xD I like it. Haha!