This page can not be cached.

Header set Refresh "30;index-25kb-cycle.html"
Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate"
Header set Pragma "no-cache"
Header unset ETag
Header set Expires "Wed, 11 Jan 1984 05:00:00 GMT"

This is a 1MB jpeg file of a cat. It can also not be cached.