Only Danny Trejo could make a lesson on LA Metro rider etiquette badass. (Courtesy LA Metro via Youtube)

LA Metro may take rider etiquette seriously, but they've taken a decidedly funnier approach to educating the public about it.

Who can forget those highly produced, Japanese-influenced videos Metro released last year, featuring the powered-up Super Kind taking on her nemesis and fellow passenger, Rude Dude? The manners maven — played by YouTube star Anna Akana — taught lessons about aisle blocking, set hogging and gross eating habits, all set to synthy pop tunes and a colorful assault of animation.

Well, Super Kind and Rude Dude are back, this time with messages about playing loud music, letting riders exit before boarding yourself and not selling things on public transit. We have them all for you to watch below.

First up, a lesson on not playing loud music, with the help of a headbanging heavy metal onslaught featuring the lyrics: "some people just want some peace and quiet you know, so just use your headphones."

I for one hope they'll play this banger over the P.A. system at some point. *horns hand emoji*

Next up, we have a bit of a fakeout, but a deeply satisfying one. Just when it looks like Super Kind is about to drop another musical lesson on Rude Dude, a fellow passenger jumps in — none other than L.A. legend Danny Trejo.

Trejo takes over the PSA to implore viewers to wait for others to exit Metro trains before hopping on. "When you don't wait your turn to enter the train, it's rude, and potentially dangerous," he says to the camera.

"And believe me, I know a thing or two about rude and dangerous. I'm Danny Trejo."

What other regional transit PSA can compete with that?

The final video reveals a dark and sinister secret.

Super Kind confronts Rude Dude for selling knockoff items of their likenesses on the train. She grabs him and teleports to the moon, then leaves Rude Dude there.

It's then revealed that Rude Dude is not alone. His fellow badly behaving selves are all there, too. Super Kind has removed all of them from Earth, where they're likely to meet a cold, lunar death.

Haunting stuff, but hey, you learned some valuable lessons, right?

Metro might not want you to sell things on its trains and buses, but it will sell you things about its trains and buses. There's even a Super Kind store online, if anyone was looking for Rude Dude socks.

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