Conversation so far:
Why did the band Thursday re-unite?
On the reunion, Geoff Rickly said: ... Earlier this year, we were able to reconcile all of our differences and spend time together.“
When was Thursday's reunion?
Thursday announced they would reunite for Atlanta, Georgia's Wrecking Ball music festival in August 2016.

Question: What did they do at the festival?
Self-contained rewrite: What did Thursday do at the Wrecking Ball music festival in August 2016?