I’ve even got a story on fimfiction of a humanized Silverstream farting and finding it fun/funny, but I would really not like to be the first to depict her farting. You did Ocellus and someone else kind of did Smolder with the “pull my finger” thing (assuming dragons can even fart with tails that thick)
 
I can understand why no one’s done it, though. Though she’s as hyperactive as Pinkie, she looks so graceful even compared with Rarity that it is really hard to imagine her farting. (Then again, Ocellus is hard to imagine too)

Is anyone going to do one of Silverstream farting? No one has done that yet

aww Silverstream always looks so graceful even when she cringes