Best or weird or uncredited cameos, Internet edition.

I have seen many threads about cameos from the movies and TV, but I know that the Internet has a lot of them, and many that I and others have missed.

Some interesting and weird ones I noticed:

Beakman, from the old kids science show from the 90’s, made an appearance in an episode of Captain Disillusion.

BEAKMALLUSION: Free Energy Devices

The guys at Know Your Meme, got Weird Al Yankovic to explain the Autotune [del]monstrosity[/del] device.

Know Your Meme: Autotune feat.

Knowing that the Internet is huge, I know that I have missed many more cameos or contributions, so post your favorites or weird ones out there that you think should be noted.

Doesn’t get much weirder than Robin Williams in The Adventures of Baron Munchausen.

There was the time Rick Astley himself rickrolled Choir! Choir! Choir!

How does this qualify? Yes, it’s on the Internet, but it doesn’t originate from the Internet.

I liked that one, but that was not originally from the Internet.

Ummm, since TV has been called the little sibling of the movies I still wonder what do they call the Internet in relation to them.

The estranged step child? :dubious:

The Guild season 5, episode 8 featured cameos by Erin Gray, Colin Ferguson, Tom Lenk, Dichen Lachman, Eliza Dushku and Grant Imahara.
but the best cameo in there is Kevin Sorbo.

Similarly, Alan Tudyck’s Con Man is packed full of cameos by Sci Fi alums (including Joss Whedon).

Epic Rap Battle of History has tons of cameos by other youtubers like Rhett and Link from Good Mythical Morning, Grace Helbig and Smosh but their biggest names have been Snoop Dogg and T-Pain.

I wouldn’t think it really qualifies as a cameo if the person is the star of the short, does it? But then again, I guess they’re not directly credited, so that qualifies?

In College Humor’s Batman series Patton Oswalt played the Joker in one episode. Maybe more guest star than cameo but close enough.

I misunderstood the point of this thread, then.

I think that is OK, I will allow also “guest starring” roles, I’m interested in cool or interesting appearances from old media guys and gals that show up in web only productions to share with others. I’m also looking for cameos or guest stars from other Internet productions like:
Angry Video Game Nerd VS. Nostalgia Critic

Marvelous TV started a series of Marvel superhero parodies called “Bad Days”. Stan Lee shows up in most of the episodes. Not really weird or uncredited, but definitely neat.

Speaking of Stan Lee.