In colloquial speech, is basically a way to respond to questions like "Have you ever noticed how the more busy Jack gets, the more he sweats". means something like "Yeah, I recognize that situation" or "Yeah, I've been thinking about that too" or "Yeah, I _have_ noticed that".
One meaning of is 'humorous material' or 'joke material'. There's a term , which basically means humorous questions like the above, which you can use in conversation as jokes.
Here, although I'm not familiar with Twitter lingo, I would guess that the poster is using 24 to refer to about the TV show '24'. So basically "In 24, have you noticed how [...]".