Did you enjoy the Leopard intro video that played after your install completed? You can find the source audio and video buried in the Finder:
Navigate to /System » Library » CoreServices » Setup Assistant. Control-click on Setup Assistant and select Show Package Contents from the pop-up menu, then navigate into Contents » Resources. Play the Control-click game again on TransitionSection.bundle, then navigate into Contents » Resources. Whew. As a shortcut, just copy the following text (triple-click to select it all), bring up the Go » Go to Folder box, and paste:
Mac OS X Hints
http://hints.macworld.com/article.php?story=20071028043905775