Several. Cookie Monster spends the night with Ernie. I found the singing cookies to be a bit unnerving. Not only that, Cookie Monster running through the wall bothered me, too.
The Count spends the night with Bert and Ernie. It was Ernie's face when he woke up.
Ernie counts sheep. I didn't like loud sirens, or balloons popping, and Bert's screaming bugged me.
Cartoon about the life cycle of frogs. It was when the frog yelled "HEY KERMIT!" at the end that scared me. Every time it came on, I either muted it or changed the channel.
"Lifestyles of the Big and Small," or at least the Big segment.
"Wet Paint," when the singer's vest became all yellow. No idea why that bothered me, it just did.
A cartoon involving a bird, a cat, and a lion (and weird music)
Frazzle
There was one cartoon about the letter K that didn't scare me, but it did upset me. It was the one at the end where a kitten is tied to a kite, and it floats up into the air out the window, and it's meowing.