Metallica's WorldWired tour kicked off in 2016. Every night, about two-thirds of the way through the set, there was a jam: Rob Trujillo and Kirk Hammett's Doodle. In Amsterdam in the summer of 2017, on the second of two nights at the Ziggo Dome, the pair changed things up and added a ragged cover of Golden Earring's Radar Love to the Doodle. A tradition was born. A local song, for local people. And it's happened at most Metallica shows in the years since.
It's rough and ready. The parts are learned before the performance, and Rob reads the lyrics from a music stand. They're often in a foreign language. But it's become one of the most anticipated parts of the show.