David Firth is a very talented flash animator. I find his animations really interesting. Most of them (maybe all of them) are surrealistic and, usually, resemble dreams or nightmares.
One of the best animation series that Firth has made is Salad Fingers. Salad Fingers is a creepy green masochist man that loves touching rusty spoons and other rough surfaces with his oversized fingers. He lives in a strange world that seems to me like the earth after a great nuclear world war. I won't say more. Just click here and watch the 7 episodes that have been until now released. It will give you the creeps but watch all of them very carefully. Salad Fingers is really well done and is one of the best animations on the Internet. It is just NOT another violent and disgusting flash animation.
(IMPORTANT EDIT: It seems that Firth changed the structure of his website and the following trick will not work correctly. To view the flash animation on it's own and not on a webpage you find it's name in the source code of the corresponding webpage and then copy paste it's address manually in the address bar. Another solution would be to save the page. This will save an HTLM file and a directory with files. Find a file with ".swf" extension inside this directory and open it with Firefox. Then follow the instructions bellow. The text in the square brackets  was working with the previous structure of Firth's website, ignore it and do what I told you instead. If I confused you then please leave a comment and I will try to explain it better to you.)
Here is a trick that might reveal strange things or even easter eggs in some of his animations. While you watch an animation on fat-pie (Firth's website), [change the ".html" ending of the current page into ".swf" so that you view the flash animation not embedded in a webpage]. Now by resizing the browser you will also resize the viewport of the flash animation and therefore you will be able to see things which normally would be out of sight. Try resizing your browser into a short and thin window and then view this animation. After the kid that smelt funny is burned you will have to pause on the point when the headmasters door is shown. Now, look at the board on the right. It will be like this:
Normally the right part of this board ("DON'T READ THIS BIT YOU LOSER") wouldn't be visible. ;-) Please note that I tried this with Firefox on Ubuntu Linux. I do not know if it is possible with Internet Explorer or Opera. I would be pleased if I had some feedback on this.
Anyway, back to the point. Go now to fat-pie cartoon section and watch everything. They rock!