What’s a perk to living in the hometown of one of the biggest current names in music? Impromptu Sunday-night performances.

Vegas superstars The Killers gave a surprise performance in front of an at-capacity crowd Sunday at Bellagio’s The Bank nightclub when they took to the club’s balcony at 2 a.m. (The rumored start time was midnight, but when you’re an international rock success time isn’t money — you are).

Frontman Brandon Flowers dressed down for the occasion, opting for a collared button-down and khakis over his infamously elaborate feathered stage wear, matching the unpretentious mood of the night’s performance.

Opening with “Human,” Flowers seemed stiff and initially didn’t appear to be feeling the short set, which consisted of a whopping two songs. But for the closing number, “Mr. Brightside,” he got into the act, addressing the audience with a Vegas shout-out and leaning over the balcony, arms out-stretched, under a showering of tiny bubbles that fell from the ceiling mid-song.

The brevity of the mini-show may have been disappointing — right as the energy began to build the quartet walked off-balcony, the live “Mr. Brightside” giving way to the recorded Papa Roach’s “Last Resort” — but for an unadvertised show that was free for locals (non-locals had to pay $40), it was hard to complain about unmet expectations. There simply were none.