Greatest Rock & Roll Song - Ever

[csbrewfisher]

Knowing that every answer is completely subjective, I'll suggest this one for several reasons.

1. It is epic in length
2. It has blistering guitar work and solid drumming
3. It was performed before 1/2 million people
4. It gives nods to several "classic" rock and rollers
5. It receives a special reward at the end

It's not my favorite, but it may be the greatest ever.