Elon Musk drew a picture of a farting unicorn to show off a new hidden feature in Teslas (TSLA)

Have you ever seen a picture of a farting unicorn? Have you ever seen a picture of a farting unicorn, drawn by Elon Musk? Behold:

elon musk farting unicorn
elon musk farting unicorn

Elon Musk/Twitter

Elon Musk
Elon Musk

REUTERS/Danny MoloshokOn Wednesday night, the Tesla and SpaceX cofounder took to Twitter to share an unusual image: A flatulent mythical beast, surrounded by smiley faces, a rainbow, and a car appearing to vacuum up the unicorn's gaseous emissions.

It wasn't just a stroke of inspiration that Musk felt compelled to share with the world.

Instead, the famous entrepreneur used the image to show off a new hidden feature in Tesla's cars: Sketch pad.

Tweet Embed:
https://twitter.com/mims/statuses/847259545755820033
Made today on Tesla sketch pad pic.twitter.com/Z8dFP2NN41

The feature is exactly what the name suggests — a sketchpad app that lives on the electric cars' touchscreens. It comes with the latest software update, V8.1, and it's accessed by pressing the "T" three times, Musk said.

Tweet Embed:
https://twitter.com/mims/statuses/847234747747020800
If you just downloaded V8.1, tap the the T on center screen three times

Musk didn't come up with the farting unicorn himself, however. It's borrowed from a mug he owns and shared photos of in February. (It sells online for $28.)

Tweet Embed:
https://twitter.com/mims/statuses/827983309359763456
Rainbows, unicorns and electric cars pic.twitter.com/oGHkVUmpdi

It is, he says, "maybe my favorite mug ever."

The rear of the mug reads: "Electric cars are good for the environment because electricity comes from magic!" The magic of unicorn farts, apparently.

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