On the episode entitled "Ripped Pants", when Spongebob is in the tent after surfing, he is making a list of his antics when ripping his pants. He jumps out and shouts, "Not ripped pants, pants ripped off!!" when he does this his sleeves are still attached to his arms. When he says, "where did everybody go?" his sleeves are gone! You next see Sandy and Larry playing volleyball, and when Spongebob says, "Sandy would rather hang out with Larry!!" his sleeves are back on his arms!