It’s not a sign of the apocalypse.

It’s just Anthony Ray, a.k.a. “Sir Mix-A-Lot,” performing his 1992 hit “Baby Got Back” with the Seattle Symphony.

“What I want to do now is something you really should not do,” Mix-A-Lot said before inviting “a couple of ladies” onstage for an enhanced version of his ode to the female gluteus maximus.

“I don’t touch,” he said. “We will not bite unless you want us to.”

Some ladies had to be turned away.

Mix-A-Lot, a Seattle native, performed as part of a series at the symphony that “features commissions, concerts and educational activities that use composition as a catalyst for collaboration and engagement in music.”

As the Seattle Times explained, the collaboration was conceived by London-based composer Gabriel Prokofiev, grandson of the Russian composer Sergei Prokofiev — the man behind “Peter and the Wolf.”

Like the San Diego Opera and other classical companies, the Seattle Symphony has faced money troubles and labor disputes, but is repackaging itself as a contemporary orchestra.

Hence: an opportunity for Mix-A-Lot to refer to a conductor as “the shiznit.”

H/T Gawker, with an excellent headline: “Sir Mix-A-Lot Raps ‘Baby Got Back’ With a Full Orchestra at His Rear”