One has to admit, the Grinch lifting up the entire sleigh toward the end of both the cartoon TV special and the live-action movie is pretty cool.
And then, the true meaning of Christmas came through,
As the Grinch found the strength of ten Grinches. Plus two!
The movie, while it doesn't repeat this line, does give it much more heft by showing multiple times throughout the movie that even before his Heel–Face Turn, the Grinch was already freakishly strong. It even went back to childhood when, fed up with all the bullying he's had to suffer through, the young Grinch lifts an entire Christmas tree and all its trimmings over his head and throws it across the room.
The movie's version is arguably even more awesome by having the Grinch save not just the sleigh, by Cindy Lou as well!
The movie amps it up by recreating the Grinch's classic evil grin.
Lou stopping the Grinch's speeding sled with ONE HAND.
Lou standing up to the Mayor, saying he's glad the Grinch stole his presents, because it helped him realize what Cindy spent the whole movie saying, that Christmas is more than all the gifts and contests, it's about love. Also counts as a Crowning Moment of Heartwarming.
The Grinch: Of course they are. That's what it's all about, isn't it? That's what it's always been about! Gifts. Gifts. Gifts-gifts-gifts-gifts-gifts-gifts! Do you know what happens to your gifts? They all come to me. In your garbage. You see what I'm saying? In. Your. GARBAGE! I could hang myself with all the bad Christmas neckties I found at the dump! And the avarice... the avarice never ends! "I want golf clubs!" "I want diamonds!" "I want a pony so I can ride it twice, get bored, and sell it to make GLUE!" Look, I don't wanna make waves, but this whole Christmas season is... stupid! Stupid! Stupid! (looks up to and advances towards Martha May Whovier) There is, however, one teeny-tiny Christmas tradition I find... quite... meaningful. (snatches the mistletoe off the ring box and holds it over his head) Mistletoe. (Holds the Mistletoe over his behind) Now pucker up and kiss it, Whoville! Boiiiiiiiiinggggg!
Then afterwards, he takes the razor the Mayor gave him and shaves his hair with it, before proceeding to just go to town and wreck the Whobilation. After what the Whos did to him back then and showed that they learned nothing even decades later, it's so immensely satisfying to see Grinch bring hell upon them.
A meta example for Boris Karloff, the narrator of the cartoon special. At the time of voicing, Karloff was ill and nearing the end of his life. A cardiologist visiting the studio was stated as not believing Karloff would last through the film's production. Ted Geisel (Seuss himself) recollected the end of that day:
Geisel: It was an exhausting day. Everything went wrong. At the end of the day, we were all wilted…except Boris. As we dragged ourselves off, he left whistling.
Just the fact that they got Boris Karloff - one of the most famous and respected horror actors in history - to voice the Grinch is all kinds of awesome.
The film's glorious recreation of the Grinch's Christmas heist.
The fact that in the film, the Grinch managed to build a (mostly) working, flying sled, out of nothing but literal garbage and junk. And while this would've most likely taken days for someone to do, he did it in just a few hours!
Martha: Merry Christmas, August May-Who! I’m afraid I do have something for you. (Holds out the ring box to him) Your ring back. I’m sorry, but my heart belongs to... (looks directly at The Grinch) someone else.
A meta-example: The make-up for the Grinch in the movie is astoundingly detailed and fairly accurate to Seuss's illustrations. The Oscar for Best Makeup was well deserved.
Not to mention having to wear that makeup. Carrey went on record that the makeup process for the film was so agonizing, the production had to hire a former CIA torture expert to sit with Jim and coach him on how to endure the process.