Crunchy Isolation

When you eat something crunchy and it's so loud in your head that you are unable to hear what anyone around you is saying. This may be intentionally used as a manner of shutting out the world or simply an unfortunate consequence of cacophonous cuisine.

Teacher: "Can you answer this question?"
Student: "My apologies, I was in the throes of crunchy isolation. What was your question again?"
Teacher: "Who wrote Fed 51?"
Student: "Maybe I should have stayed in my crunchy isolation..."