Review: Slipknot parties like it’s 1999 at Aftershock Festival

Slipknot had something really cool in store for old-school fans at the Aftershock Festival in Sacramento on Friday.

The topnotch metal act — known outside of its massive fanbase primarily for wearing creepy masks — wanted to celebrate the 25th anniversary of its debut album by taking listeners on a trip back to when that double-platinum-selling eponymous outing was first released.

“Welcome back to 1999,” lead vocalist Corey Taylor informed the huge crowd assembled for the band’s headlining set on Day 2 of the festival.