Angus McGonagle, the Argyle Gargoyle, gargles Gershwin gorgeously. He was originally booked as the guest star on episode 417 of The Muppet Show but was bumped for the cast of Star Wars when they showed up at the Muppet Theater. He eventually managed to get on stage, where he was joined by Mark Hamill in gargling "Summertime." Furthermore, in the climactic confrontation of Dearth Nadir and Chewbacca, Nadir called forth McGonagle and the mighty Wookie proved no match for his Gershwin gargling.
Angus also appeared in the background during "Singin' in the Rain" in episode 501, in the background during the opening for The Muppets Go to the Movies, as an audience member in Muppets Tonight, and in the crowd in issue #4 of Muppet King Arthur.
|“||I wish there was footage of us trying to gargle and then sing. We all tried it, even Jim. We were all cracking up at each other. It was hilarious. We ended up with Richard Hunt doing the gargling and me singing the lyric. If you want a laugh, try it yourself.||”|
- -Jerry Nelson