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The creators of Sesame Street are skilled at creating the illusion that the puppets are living characters. Still, occasional goofs slip through, and make it onto the screen.
| Picture | Segment | Earliest Known Appearance | Description |
|---|---|---|---|
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During this sketch, Jim Henson's arms operating Ernie's arms, as well as Frank Oz's arm and head and black-rimmed glasses operating Bert, can be seen in this sketch. Later, during Everybody Wash, Henson's arm is seen again. | ||
| When Cookie Monster nibbles on Kermit, Frank's arm can be seen at the end of the Cookie Monster puppet. | |||
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When Ernie starts dancing to the radio and Bert says "Uh-huh! Okay, smart guy!", Jim's head pops up near Ernie. | ||
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As Jack puts the R block back on the brick wall, Frank's head pops up under Cookie Monster in the corner. It constantly pops up throughout the rest of the sketch. | ||
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Both Frank and Jim's heads can be seen when Ralph and Trudy Monster jump up and down and rip the curtain. Jim's head is seen when Ralph scares Guy Smiley and says "I scared you, huh?", and when Guy Smiley says, "You got a cookie!" | ||
| When the Anything Muppets erupt in cheers, the puppeteers' heads can be seen at the bottom of the screen. Caroll Spinney's head is especially visible in one moment, under the Pumpkin puppet. | |||
| When Ernie and Bert are arguing about who's taller, we can see Frank's head and arm operating Bert. | |||
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After Guy Smiley introduces the game at the beginning, Jim's head briefly pops up. Plus, as Guy flips the game board numbers, a crowbar-like rod of some sort is seen flipping said numbers. | ||
| A performer's head and arm can be seen while puppeteering Grover. | |||
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Frank's head is visible underneath Professor Hastings near the end of the sketch, when Hastings rushes up to the desk where Guy Smiley and Mr. Foot preside. | ||
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Jim's head and white sleeve can be seen when Ernie puts down the bowling ball on the table. | ||
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Throughout the sketch, the bottom of the set is exposed, and during the skit, Frank can be seen performing Bert. | ||
| A hand can be seen in the lower right hand corner operating the game board. | |||
| Throughout the sketch, Ernie's sleeve is visible in several shots, and so is the top of Jim's head (including his eyes). | |||
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When Ernie walks over to Bert's bed and Bert asks, "Ernie, what are you doing?" at the end of Bert's bed, you can see Jim's head performing Ernie. | ||
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Near the end of the song, "What Do I Do When I'm Alone", Frank's hair is seen below to the left of Grover. | ||
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When Bert and Guy Smiley are exiting the performance, a performer's head can be seen, as well as that performer's arm under Bert. Plus, when The Alphabeats exit the performance, another performer's (presumably Richard Hunt's) head pops up. | ||
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Near the end of this scene, Jerry Nelson's head is briefly seen under Rodeo Rosie. | ||
| When Herry walks offstage and knocks a pole over, Jerry's arm is briefly seen performing Herry's left arm. Also, a performer's head is seen under Cookie Monster at the end of the sketch. | |||
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Near the end of the sketch, viewers can see Frank's top part of his head is seen a couple of times while Bert is behind the painting. | ||
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Episode 0692 | The top of Jim's head can be seen near the end of this sketch. | |
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Jim's head can be seen through the plants under Ernie at the end of this sketch. | ||
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Episode 0722 | Lefty has ears for most of the sketches. After the camera zooms in on the painting, he has no ears. | |
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As Roosevelt Franklin begins to say "Now you know the difference between loud and soft", a performer's arm is seen controlling Roosevelt. | ||
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Towards the end of The Letter N song (after the black and white scene where Nick Normal chats with Nick Normal's Dad), The Flashing "N" disappears on the stage scene of the song. | ||
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Cookie Monster stays on stage right before a cut to a close-up of the cast entering the stage from the wings. However, Cookie Monster is behind the cast entering the stage, despite being on stage in the previous shot. | ||
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At the end of the song: Hey Food, The drummer's drum part fell off the set. | ||
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When the girl first enters the kitchen, one of the mittens she uses is plainly visible on the table, yet in the very next shot, it disappears. | ||
| Ernie's performer's head and arm can be seen performing him. Prairie Dawn's performer's head is also seen performing her. | |||
TV Specials | |||
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In a continuity error, the first montage of Big Bird and Barkley in China shows the dog with the hourglass around his neck. They would not receive the item until later in the story. | ||
