RiffTrax is taking over the National Geographic channel, and it’s looking to be kind of incredible. With Michael J. Nelson, Kevin Murphy and Bill Corbett providing a joke track to documentaries about shellfish, bats and birds, how could it not be?

The “Mystery Science Theater 3000″-style takeover begins at 8 p.m. ET on April 1 with “Killer Shrimp N’Friends.” “Demon Bat” follows at 9 p.m., and “Guy and a Goose” finishes off the RiffTrax marathon at 10 p.m.

While jokes and footage from the three full-length documentaries have not yet been released, you can get a sense of what’s to come in the koala video above.

WARNING: Koalas are horrible, disgusting, diseased creatures that are very much NSFW.