METALLICA feierten kürzlich ihren 30-jährigen Geburtstag und luden sich dazu namhafte Gäste auf die Bühne ein, um mit ihnen zu feiern. Auch MEGADETHs Dave Mustaine war darunter und performte insgesamt fünf Stücke mit ihnen. In einem Interview erzählte er im Nachhinein:
"Me and James [Hetfield], we were like the the Toxic Twins back when we played together and we were a very very dangerous duo. And for a moment I think I stirred some of those old feelings up. I saw one of the videos and it looked like he was having fun. I know I was having fun. I had a smile that I went to bed with."