Standing on the hood of a Buick Grand National GNX (after which Lamar named his most recent album, “GNX”), in a sea of dancers, a man clad in black sweats unfurled the Palestinian and Sudanese flags.

Are you going to be a coward?” Zül-Qarnain Nantambu asked himself before taking the field for Kendrick Lamar’s show. “Are you going to take a stand?”

The NFL said the person was part of the 400-member field cast and had hidden the flag on himself before the halftime show began Sunday night.