Wow, somehow this escaped me all these years. I feel like I’ve got a bunch of fresh XKCD to read now.
For the uneducated: On a mobile browser you just press and hold the comic (long tap). On a computer you hover over the image and the alt text will appear next to the cursor.
The alt text in this one was:
spoiler
Fortunately, the charging one has been solved now that we've all standardized on mini-USB. Or is it micro-USB? Shit.