1. Navigate to "<Main Drive>:\Users\<Username>\AppData\Local\Google\Chro me\User Data\Default\Cache". AppData is a hidden/system file, so either type it in the navigation bar at the top, or activate "View hidden and system files" from the "File Options" menu in the control panel, as I have.
2. Delete all files with the prefix "f_". Don't worry, this won't break anything.
3. Load a flash page. A number of new "f_" files will appear.
4. When the flash has loaded fully and begun playing, make sure your windows explorer window is fully refreshed and select the "f_" file with the largest filesize - usually the one at the bottom.
5. Copy this file to another location. Rename it "<insert arbitrary flash name>.swf".
6. Job done.
Note: Cascade is broken up into multiple files, so you're gonna have to grab all of them if you want to download that.
If anyone is interested, you can then create high-definition video copies the same size as your monitor by recording fullscreen playback of the files with a program such as FRAPS. Some video editing programs allow you to directly import .swf files, mainly those made by Adobe, but this seems to remove animation from individual elements - I.E. if somebody's expression changes or a meteorite should be animated with burning flame, they will jsut remain static, rendering the flash in this form useless.