There was an animated segment in which a kangaroo is repeatedly pulling letter K's out of her pouch and demonstrating K-words. I think one was "kick", as she kicked the letter out of range. One word was actually "kill", in which she put her foot on the top of the K's riser and made a "snfffff" sound. I must say that confused me. Anyway, the marsupial concluded with some advice "...for all you kangaroos out there. Don't keep Ks in your pouch. They scratch!"
And I do remember the "Shut up!" line. In Kermit's "News Flash" of the story of Rapunzel, the prince called out "Rapunzel, Rapunzel, let down your hair". She kept replying "My WHAT?", causing to prince to angrily yell "YOUR HAIR". Finally she understood, and Rapunzel's extra-long wig fell right off. The prince then realized his horse ran off and he started bawling. He yelled "SHUT UP" to whatever Rapunzel said after that. I think that line was partially masked by Kermit's "regularly scheduled programming" shpiel, and it could very well be that the line was ad-libbed.