Hacker News Reader

Do NOT forget 8.8.4.4!

The tooltip is an integral part of xkcd.

ROFL! I did not know this. To be specific if you are not an XKCD reader: hover your mouse over the comic for a second punch line.

Or if you are on mobile m.xkcd.com/<number>

Damn, now you have to start from the start and pick up on all those missed jokes.