Steps to reproduce:
1. On mobile device (iPhone 6S), go to http://www.rifftrax.com/catalog
2. Scroll to the bottom to try to get to the filters.

Expected Result
You see filters and can change them

Actual Result
The page keeps lazy-loading more movies in the catalog.

Since the site is responsive, it's probably pushing the filter section to after the catalog, but when the browser gets to the bottom of the catalog, it loads more episodes. Now the filters get moved down to underneath the next X episodes that loaded. Unless the loading fails or you have the reflexes of a Pumaman, you'll never be able to choose filters.