Zack D. Films turns a backward cap into proof of a third dimension
A whiteboard cyclist can't undo a simple hat flip, and the animated Short drew about 5.7 million views since yesterday.
No. 6 on the daily chartNo. 1 on the Science chart
Why this story? One of the most watched videos since yesterday, with 5,732,288 views.
How To Show 2D Beings The Third Dimension 🤯
Turning a cap around takes one hand, unless the direction you need doesn't exist in your world. That is the whole puzzle of "How To Show 2D Beings The Third Dimension 🤯," a half-minute animation from Zack D. Films.
A three-dimensional man reaches into a whiteboard where a drawn girl is riding her bike, lifts off her brown cap and flips it. "Then you flip it around and put it on backward," the narrator says. She can slide left and right, up and down, but forward and backward is off the table. When she tries to fix the cap herself, she can't. "So by doing it for her, you're proving that there's an extra dimension that she never knew existed."
The comments have two subjects. Some viewers take the lesson one step further and ask what a fourth-dimensional visitor could do to us. Most of the others are teasing the channel over the cyclist, a figure they recognize from earlier Shorts, who once again ends up on the wrong side of the experiment.
Published on Trari
Where next?
What viewers say
Let the bike girl rest hermano 😭🥀
@shaznasaeed1126See it on YouTubeZack indirectly explaining 4D
@YellowDotAviationSee it on YouTubeThe bike girl is even in the 2D world now. Still she manages to fall
Thanks for all the likes. This is the most I ever got. And within just 13 hours ❤❤@atreya-e2iSee it on YouTube
5 more comments
For those who don't understand, 2D only contains the X and Y axis, Y being up and down, and X being left and right, while in 3D there is the Z axis, being forward and backward.
@Zoomcat355See it on YouTubeChill with the bike girl brochacho 😭
@BobVR38See it on YouTubeThe girl is not safe even in 2D.
Have some mercy, Zack 🙏🏻 😭@AnantRaj001See it on YouTubeNow I can confidently say,BIKER GIRL IS UNIVERSAL ♾️
@GUN-u1See it on YouTube"I will rotate you in the 4th dimension" new threat just dropped
@GuiDuckzSee it on YouTube
Public comments from the video's page on YouTube
- Channel
- Zack D. Films
- Subscribers
- 29,500,000 ▲ 100,000 this week
- Channel views, last 7 days
- 698,315,861
- Channel views, pace per day
- 42,171,015 (on a normal day: 123,754,844)
- Video published
- November 2, 2026
- Video views so far
- 8,289,300 (2 days online)
- Video views, pace per day
- 5,730,434 (on a normal day: 4,424,830)
The numbers
Here is how the hat-flipping Short and the channel around it stand.
💡 Test your knowledge
What is the four-dimensional counterpart of a cube called?
A tesseract, or hypercube, extends a cube into a fourth dimension the way a cube extends a square into a third.

