By the summer of 1967, Jefferson Airplane had reached that strange level of fame where police showed up at their concerts before the band did. Crowds were loud, venues were cramped, and officers hovered around the edges waiting for trouble that usually arrived right on schedule.

On August 21, 1967, the band pulled up to a California venue already buzzing with tension. A cluster of uniformed cops stood near the entrance, watching the crowd like they expected the counterculture to explode at any moment.

One of the Airplane guys — stories differ whether it was Paul Kantner or Jack Casady — took one look at the officers and said exactly what a 1960s rock musician would say:

“Hey, the pigs are here.”

It wasn’t whispered. It wasn’t subtle. It was said with the casual confidence of someone who’d been calling police “pigs” for years.

The officers heard it. One of them turned.

Grace Slick wasn’t the one who said it. She wasn’t even talking. She just happened to be the closest person to the cop when he reacted.

He raised his canister and maced Grace Slick directly in the face.

No warning. No conversation. Just a burst of burning spray that hit her eyes and nose and sent her stumbling back, half‑blind and furious.

The crowd erupted. Band members shouted. Fans surged forward. For a moment, it looked like the whole night might collapse into a full‑blown riot.

Grace didn’t leave. She didn’t hide backstage. She didn’t demand the show be canceled.

She washed her face, blinked through the sting, steadied herself, and walked onstage anyway — eyes still red, adrenaline still pumping.

People who were there swear the performance felt electric. Grace sang harder, louder, sharper, like someone who had just been maced because of another person’s smart mouth and decided she wasn’t going to let it ruin her night.

It became one of those stories that followed Jefferson Airplane for decades — the night the cops showed up, someone yelled “the pigs are here,” and Grace Slick took the hit for it.

Some singers talk about rebellion. Grace Slick inhaled it, wiped her eyes, and kept singing.