Brain burn

When a person sees an event or an image that is so horrible they will never be able to forget it.

The sensation of severe burning in your sinus when something nasty makes its way up there, for example, horseradish, and even worse, wasabi.

When all you can think about is about Burning Man even though you have a job, deadlines, a wife, a mortgage, pets, etc. The condition of not being able to focus on anything else but Burning Man.