Joy is a type of Emotion. Surprising can cause/lead to Joy. 
Person wants (to) Confident. Person does not want (to) Nervous. Nervous is a different concept from Cool. Cool is related to Band. 
Emotion <--IsA-- Joy <--Causes-- Surprising 
Confident <--Desires-- Person --NotDesires--> Nervous <--DistinctFrom--> Cool <--RelatedTo--> Band 