Top Reddit comment:

That was amazing, usually when I see big domino contraptions, there are parts that fail. Here, nothing was triggered prematurely, no sections left standing, it all just worked, which is especially impressive with the elevated bit.

Edit: apparently dedicated domino channels are a thing. Of course, why not. She even has 750k subs. Imagine having to explain that job to your grandparents.

Hevesh5 is a professional domino artist.

Her channel has more than 200 million views.

Her website: http://hevesh5.com/

Another Reddit comment:

This is what it feels like when your lengthy code is finally running smoothly.