I've been trying to find the term for this. A series of tweets in a row about the same thing, usually to alleviate the 140-character limit.
Multi-tweet essay? Multiple-tweets?
Apparently it's called a Tweetstorm.
Since RIVER OF EXPLODING DURIANS' premiere in Tokyo last October, the film has gotten some Tweetstorm from viewers in Japan. Their thoughts had been very insightful and invaluable, so I always wanted to put them here. To help myself remember.