If you never had to try and make cones fit to graph paper without the benefit of a template, nor had to deal with the way cone effects used to be handled back in the day, you may not understand Mark's woes.

Steve(n) understands, even if Tracy and Andrew go on a cone-knowledge-mocking-spree.

And then?

REVELATION!

Finally! How to envision cone area of effect becomes clear!

HUZZAH!

References:

Cone: https://en.wikipedia.org/wiki/Cone

Cone on graph paper: https://i.imgur.com/xS8YLPU.png courtesy of https://www.reddit.com/user/SorteKanin/