Your musical whiplash

What are two shows that you saw, one of them metal, that are a musical whiplash?

In May 2009, I saw Napalm Death w/Kataklysm, Abigail Williams, Toxic Holocaust, and Trap Them.

Later than month, I saw Leonard Cohen. He needed no opener.

These were both excellent shows.

(I posted this photo on my local subreddit recently. This post was inspired by one of the comments.)