Tiny Tweetfics (writing exercise)

I've started a practice inspired by some Japanese Gintama fans I follow on Twitter. They use the character restraint on Old Twitter, 120 characters, to write some extremely short fanfic based on a pairing and prompt. Since Japanese characters can say more than Roman letters, I took the liberty of expanding the limit to 230 characters, or in other words exactly how much you can use to fill up a single tweet.

The whole point of this is for it to be a kind of ephemeral throwaway writing exercise, lowering your inhibitions because since it's so tough to write something actually good, I just... write something. 100-word drabbles actually feel intidimidating to me (though 300-word ficlets don't) because they're so much about being a Challenge to be Only This Short, But Good! But these Twitter tiny-fics don't feel like they have to be good. Especially since there's no edit button on Twitter...

Since these tweetfics are meant to be ephemeral, I really shouldn't save the links to them at all, but here I am posting them anyway! Eternally wishy-washy, that's me.

The pairing is Gintoki/Katsura, no spoilers. The first three are light-hearted, the last two more serious. I'm afraid I came up with the prompts myself, so they're not "pure" prompts.

Think about what you did
Ear-Cleaning
Souvenirs
Relief
Mask

It's interesting to be restricted to character count rather than word count. Have any of you done similar writing exercises?