If you’re an engineer, software developer, mathematician, or scientist, you’re probably already familiar with Randall Munroe’s excellent webcomic xkcd, which is one of my favorite comics. If you’ve never heard of xkcd, you might want to check out the most recent xkcd comic, which features model railroading by exploring the possibility of nesting HO (or is it H0?) layouts.
You can visit the xkcd web site to see this comic and many others, but I’ve also embedded the comic here:

This xkcd comic embedded under the terms of the xkcd license, which is a Creative Commons Attribution-NonCommercial 2.5 License.
NOTE: When reading comics on the xkcd.com web site, be sure to hover your mouse over the comic long enough to see the alt-text pop-up for the image. There’s usually additional humor there as well. You might want to see the alt-text popup for this model railroad comic by visiting the xkcd website.
For more about Randall and xkcd, visit the about page on xkcd.com.


Then you’d have to maintain at least three layouts – HO, N, and Z…
Nah, it’s all I can do to keep up with the maintenance on one large N scale layout.