General Information ← Knowledge Base What is RiffTrax? How do I enjoy a riff? Watching a riff sounds hard. How do I use my gift cards? Can I upgrade my purchase to HD? How long do I have to watch my purchases? Why do you edit the movies? What are "RiffTrax Presents"? What's an "iRiff"? Why don't you do as many blockbuster MP3 riffs? Is corn grass? How do I redeem my Humble Bundle code? How do I get my #BringBackMST3K Rewards?