Page Transitions are another way to personalize your web pages due to the fact that no one really uses them.  Usually when someone comes across one, it is their first time and are really impressed by it.  I would not recommend it for sites that anticipate a lot of hits.  When someone becomes a regular visitor to your site, things like this lose their luster rapidly.  Basically, it makes your page load differently and exit the same or similar.  This is another one of those things you will have to play around with to get your desired transition.  This is also another IE only feature.  An example is shown below:

The bolded areas are ones you will need to change in order to personalize this feature for your use.  The values that specifically may need to be changed are the numerical characters.  This must be applied along with your other Meta tags (<meta> or </meta>), being contained directly above the Title tags (<title> or </title>).