You could! As far as I have read, that program allows you to do just about any sort of visual effects you want. Rumor has it it's the stuff they use for effects and whatnot in movies and TV shows. Unfortunately I only know how to do lightsabers at the moment but I have seen some tutorials on how to do lightning and stuff. That could be cool.
And perhaps next time I get a movie to work on I will take some screenshots for tutorial making.
Edit - So I started a new video and have been taking screenshots so that I can maybe write a tutorial. On a side note, I seem to have found After Effects CS5 on Amazon from anywhere between $300 and $600. I still don't think I could justify that unless Randomland started making super awesome blockbuster quality movies or something. Which undoubtedly would be awesome but highly unlikely I'm thinking.