I learned, the hard way, never to overwhelm a flimsy home paper shredder with a serial shredding job.
First, the thing overheats and shuts down.
Then, it stops autofeeding unless you hit reverse before evert new page.
Then, it ends up being a one-page, reverse-first shredder forever more. Even though it was designed for 5 pages at a time, and the sad label still says so, even two pages at a time are WAY too much now.
Instead, take large jobs to some place like this – cheap and easy! http://www.absolutedatadestruction.com/
Or have a bonfire, like Caren did!