Animators spoofs and jokes on cels!!!!!!

Hi All
I would like to know how many spoofs or jokes you folks have found on cels you own.
What I mean is,I'm sure you are all familiar with the little mermaid spoof cover art from a unhappy animator that had the, lets say male appendage on it.
I have found a scene in the All dogs go to Heaven2 movie that has one of the cels with a condom on it. Very funny scene but if you did not know it was there you would never see it as it was only on one cel in the whole scene.
I asked a few animators I know and they all told me it is done all the time on animated shows, Its like they try to see how far they can go without getting found out by the producer or editor and to see if they can get it on screen.
I'm told that every show out there has some and I was wondering if anybody else here has found any cels like this?
If you have please post it here.
Thanks,
Roy

Here Is a link to my site page I put these on.
http://backlotanimation.rubberslug.com/gallery/master_query.asp?SeriesID=20646
Enjoy

I don't own the cel but I know of one from the Macross movie. There is one frame in a sequence of cels for the flight of some missles in which the closest missle is replaced with a Budweiser can. If you are sharp and paying attention you can see it while watching the movie without having to pause on the frame.

I'll have to take another look at my collection sometime as I'm sure there's something peculier in there...
Like Mokman, I know of a few brief shots in other series/movies but don't own the artwork myself.
In Akira, there's a severed head in a trashcan and an arm in a box as the bikers rush through and knock it all over.
In the same film, one member of the crowd is wearing a T-shirt with the word 'Young' on it, this was the publisher who first released the Akira manga. A little 'tip of the hat' I pressume.

Thanks guys keep them coming I'm making a list of them so I can be on the lookout for them.
I think I found a new thing to collect.HeeHee.

I found one more in the All dogs stuff, In the scene where charlie and sasha are pulling the towel full of food there are four scene that make up this part and in one of the scenes there is a chicken bone coming out of a peach but in the rest of the scenes it is a chicken leg not a peach.
This was a funny one not a nasty one.
I guess I should post these for you guys to see for yourself, I may password them though so kids don't see them and tell there moms and dads,NOT a good thing.

So keep them coming, were on a roll here.
Thanks,
Roy

Another one from Macross, the TV series this time. This sequence of cels actually came up for auction this year but I lost out.

In the first or second episode the main character is flying a jet that he has no training on. He ends up crash landing and completely destroying a building. If you look closely, there is a billboard on the building with the name of one of the production companies, Studio Nue. The billboard of course gets absolutely oblitherated.