Reasonably cheerful, and slightly exasperated after reading this question "What are some extremes that groups have taken with performing Wagner's Ring Cycle?" on Yahoo Answers.
It is an operatic cycle. Generally, this is not associated in people's minds with the word "extreme", unless as part of such phrases as "Extreme length" "Extreme tedium" and "Extreme Oh My Fucking God, Mozart and Bach were far better composers and they knew when to shut up; I am going to go and listen to them.".
"Extreme" is a word that should be associated with such things as skydiving and white-water rafting.
Perhaps they actually killed some warriors and got real, genuine Valkyries?