[John Brown]

Looks like there is more traffic than he expected. Acording to the link, here's what happens when that occurs.

<font color="purple">What can I do when I exceed my data transfer?

If you exceed your data transfer limit, we'll temporarily turn off your web site. To avoid these service interruptions, you can:

Reduce the overall size of your site. If you are hosting a large music or video file, and it becomes popular, you could use all of your data transfer with this one download. You can try reducing the size of your larger files, or remove them your site completely.

Buy more data transfer. If you're a GeoCities Plus or Pro user, you can choose to automatically purchase extra data transfer instead of temporarily shutting down your web
site.

Upgrade your plan. Both GeoCities Plus and GeoCities Pro offer increased data transfer, as well as the ability to buy additional data transfer as you need it. </font>

You can probably view it later when the traffic dies down.