“I love Metallica so much, but this is not something I’d agree to,” a fan reacted in the comment section of the video. Another one wrote, “Nah man… that’s gross and Lars is getting his kicks off this.”

“They asked Lars to spit on them, they hand a sign and goggles guys,” one other commenter said.

Meanwhile, another highlight from the Mexico show was Kirk Hammett’s dance to the song ‘La Chona’ by Los Tucanes de Tijuana. The guitarist dropped a video of Rob Trujillo singing at the concert on Instagram and wrote in the caption, “Viva Mexico.”

“Make viral the Kirk’s dance,” one Metallica fan commented in the post. “I LIKE THE DANCE KIRK…” another user said. “This is by far the coolest fkn thing I’ve ever seen in my life lmfao. This is why they will always be my fav band,” one other fan wrote.

“This is a great party,” Rob Trujillo introduced the song to the audience at GNP Seguros Stadium. “It is an honor to be here with all of you, with the spirit of ’72 Seasons.’ Kirk [Hammett] and I are going to play something for all of you. We are very nervous, so if you know this song, please help us by singing it.”

They played the first chords of a classic song by Los Tucanes de Tijuana from their 1995 album, ‘Me Robaste El Corazón,’ which is popular in Mexico and the U.S. The bassist wore a mariachi hat and sang lead. Metallica is doing four concerts in Mexico City for their M72 World Tour. The next shows at GNP Seguros Stadium are on September 27 and 29.