Continuity mistake: In the post office scene, when Cindy is talking to her dad, you can see a post box marked "Grinch" and it has nothing in it. Later we are shown a close-up of the Grinch mailbox and it has spider webs in it.
Visible crew/equipment: After the Grinch takes the little car, in one of the shots you can see a stage light behind him. (00:57:25)
Visible crew/equipment: When the Grinch is building the sled as he is putting the tin sheets on it there is an overview shot where you can see the shadow of the camera. (01:01:01)
Answer: Then why does it appear as a tiny speck in Horton Hears A Who?
In "Horton Hears a Who", both the book and the animated film, the speck of dust lands on a clover. In the 2000 Grinch film, the speck of dust has now landed on a snowflake because it's winter time. It should be noted that it's only the 2000 Grinch film that has Whoville as a speck similar to Whoville in "Horton Hears a Who." In the book and other adaptations, Whoville and the Whos are normal sized and probably located somewhere in Massachusetts.
Bishop73
Where are you getting Massachusetts from?
Brian Katcher
Dr. Suess was born in Springfield, MA and there are some that claim the drawings in the book are similar to Easthampton, MA and Mt. Tom (although others say it's La Jolla and Mt. Soledad in California). Residence of Easthampton put on an annual "Whobalation" to celebrate the legend Whoville is based on them.
Bishop73