We all know that GIR has had the Serious Streak every so often, but how serious would it get? you can see that below.
Bloody gir is an easter egg. has been sighted in a few episodes of Invader Zim, and Here is the B-GIR Story:
Bloody GIR was born when Nickelodeon refused to allow a scene involving GIR covered with blood, Nickelodeon productions thought it would have something to do with the influence on kids. The crew inserted the forbidden image into single frames in a few episodes.
Mortos Der Soulstealer Watch closely for Bloody Gir in the last two frames of the pipes that come out of Zim's house, just before the logo of the Swollen Eyeball and Dib.
Bad, Bad Rubber Piggies Watch closely as the final pig goes through the Space Time Object Replacement Device when the portal flashes white. You can see a VERY faint image of Bloody Gir.
Plague of Babies Watch the Voot ship crash sequence. You will notice several instances of Bloody Gir looking into the window at the left side of the screen.
Tak: The Hideous New Girl Watch as Tak's ship falls from space. As it crashes, the screen turns white. Bloody Gir is faintly visible at the center of the screen.
Backseat Drivers from Beyond the Stars Watch as the Almighty Tallest discovers the Resisty's Vort ship. A Bloody Gir appears on Purple's head as he says, "That's a Vort Ship."
The Frycook What Came from All That Space During a flashback of when Zim first started working, a scene is shown when alien customers start spitting their soda at him. When this is going on watch the window, a very familiar ship passes by. When it does to the left of Zim's head you see Bloody Gir on the ship.
Game Slave 2 At the start of the episode when the flaming piggys fly past the moon a Bloody Gir can be seen near the tail of the top middle one. Link: http://www.youtube.com/watch?v=E0Ucmj59QIo
If anyone watches some more Zim Episodes online (Zim got cancelled from Nick) and finds some other than the ones listed above, let me know, ok?