Doc Brown: "One Point Twenty-One Gigabytes* of disk space!? One Point Twenty-One Gigabytes*?!? Well, futureboy, I'm sure in Twenty-ten you can fit that in your POCKET, but here in 1992 that's a LARGE ARRAY of space. The only thing that could generate that is a bolt of lightning! a memetically popular distributed sharing system. Unfortunately, you never know when or where those will strike! ... Oh I know, we'll call it SETI and pretend it's looking for aliens, and thousands of well-meaning lab sysadmins will help us get you back home - BACK TO THE FUTURE!"

* pronounced "jig-a-bites" of course.