I also must say this, but Mater driving backwards made me
cheer too. I was like “GO MATER!” at the same time, “are you crazy?”
[size=92]I was all on the edge of my seat and grinning excitedly
when Guido did his magnificent pit stop, and also the racing bits after that. 
[/size]
After seeing Guido’s pitstop, after wards, I was like "Yeah, you go
Guido!!!" Everyone was craking up so hard.
The first time I saw CARS at the theatre I was cheering well more LMAO during the Delinquent
Road Hazards scene.
Yeah, I liked that
part too! 
BTW: Your siggy, aZnCdn, is hilarious! I laugh everytime I see!
The second, not the first, time I saw te delienquent scene, I was headbanging to DJ’s tunes.
It was so tight man. Everyone was staring at me, but it was fun.
It’s more of a happy inward glow than a cheer, but the
scene where Violet first puts on her mask by the cave makes me want to cheer. It’s a transitional point in her
character’s development, symbolized wonderfully by how her hair (of all things) is parted…and it makes me
smile every time.
Ok, half on topic story here. When I worked at a movie theatre I saw the midnight
employee sneak of Lilo & stitch. When the scene where Lilo leaps at that little red-headed brat came up, we
all started clapping and cheering. What can I say. We were a bunch of teens who enjoyed the animated hi-jinxs of
one small child wailing on another.
Oh yes, that scene gets me every single time. I was like "GO VIOLET!
YOU ARE A BIG GIRL NOW! Go get em!"
Well the one I remember most is the most recent one.
[spoil]When some friends and I went to see Ratatouille at the drive-in, we all started clapping and cheering when Linguini and Colette had their first kiss.[/spoil]
And while it doesnt necessarily make me cheer out loud, seeing Doc race around the track never fails to bring a smile to my face, no matter how many times I’ve seen it.
Edited. Please remember to use spoiler tags when necessary. – Mitch
The scene [spoil]where the rats were all working together to cook the food for the customers [/spoil]was the scene that made me cheer the most in Ratatouille.
Mitch: Whoops! Sorry! I completely forgot! 
lennonluvr9 - Haha – hakuna matata, dude! 
Here is one from the Incredibles.
I was watching the feature Vowellete and it was a Violet test animation to Sarah Vowell’s voice. I cheered because it was such a cute and funny scene and it was one completely extra.
Uhh, that part isn’t exactly cheerworthy, but it makes me chuckle.
~~=oP
For me, any time in MI when Randall is physically attacking either Mike or Sulley, but especially Mike. I’m not one to encourage violence, but there are times when there just isn’t any other option…
Toy Story
Woody and Buzz’ reunion with Andy at the end of the movie
A Bug’s Life
Everytime when Flik runs fast (For a little fella is he really fast^^)
When Flik gots the idea with the bird, runs away, comes bacvk, kisses Atta on the cheek and runs away again
Bird construction
The celebration after the bird construction
The fight against the grasshoppers
The end
Toy Story 2
Buzz and the other toys go off to rescue Woody
Woody meets Jessie for the first time
Buzz reminds Woody that he is there to make a child (Andy) happy
The plane scene
The end
Monsters, Inc.
Sulley encounters Boo
All the other monsters encounter Boo
Meeting the snowman
Return to Monstropolis
Door chasing
Sulley meets Boo again
Everytime Mike hurts himself
Mike causes the child to laugh hard at the end of the movie
Finding Nemo
Marlin discovers only one egg after the encounter with the barracuda
First day of school
Nemo gets kidnapped
Marlin meets Dory for the first time
The shark scene
The jellyfish scene
Meeting Crush
The whale scene
Marlin and Dory meet Nigel
Marlin and Nemo reunited
Nemo encouraged the fish in the fishnet to swim down
Every scene with the Tank Gang
The Incredibles
Jack Jack shows his power for the first time
Bob meets Edna
Helen meets Edna
Frozone looks for the suit
Dash runs on water
The fight during dinner
Cars
The racing scenes
Lightning and Sally goes for a drive
Tractor tripping
Every other scene with Mater
Every scene with Guido and Luigi
The poor couple lost in the desert
Everyone at the Piston Cup recognises the famous Hudson Hornet as Lightning’s crew chief
Mack commentary about the actor from the movies the sses at the end of the movie
Lightning and Sally meet again after the Cup
Lightning shows Sally his Radiator Springs style
And I’m sure I forgot to mention some XD
That is quite a list there WON!
The entire ending of Ratatouille makes me cheer the most , just because the movie is just so well-done, and the ending is just great. I love it.
Oh I can agree with you there. I was cheering that Remy achieved his life-long dream. But at the same time, I felt it was very heart warming.
Here’s what I remember from experience:
Toy Story 2: When the door opens and the cleaner is revealed to be Geri, my sister and I in that sea of audience members shouted out- ‘GERI!!’ And we didn’t care if anyone said anything.
The Incredibles: When Dash realizes he can run on water, laughs, and as he takes off, so does the jazz ensemble playing. That just was a great moment.
Cars: Guido’s pit stop moment. It took me completely by surprise and me and many at the world premiere started laughing and applauding.
Ratatouille: The moment between the man and woman struggling with the gun, before they finally give in to the passion. It’s such a fun riff on those old couples who fight become romantically attracted again bits. I still laugh and clap at that scene.