Observational Humor

You know how online, someone you kind of know will make a joke using dry wit or sarcasm?

And if you notice that they're doing that, you might play along?
Because humor is humorous and jokes are jokey?

But then you do that, and the other person explains to you that they were "only joking?"

And you're like "I know that. I was joking too--you know, because of the joke."

And they're like "Oh, right. Okay, yeah...that joke I was making."

By then, the joke isn't remotely funny any more--and I'm just vaguely uncomfortable.

True Story.