question:  What did the Nahali people do in side-shows as their talent?
context: The Blue Behemoth By LEIGH BRACKETT Shannon's Imperial Circus was a jinxed space-carny leased for a mysterious tour of the inner worlds. It made a one-night pitch on a Venusian swamp-town—to find that death stalked it from the jungle in a tiny ball of flame. With Shannon's Imperial Circus, the Greatest Show in Space, plastered so thick with attachments...." "The Greatest Show in Space. I've wet-nursed Shannon's Imperial Circus around the Triangle for eleven years, and I know. Nobody insults Buckhalter Shannon's Imperial Circus to Buckhalter Shannon's face unless he's tired and wants a long rest in a comfy fracture-frame. I had plenty of time to see his grey-green eyes get sleepy, and hear the quarter-Earth-blood Martian girl wailing about love over by the battered piano, and watch the slanting cat-eyes of the little dark people at the tables swing round toward us, pleased and kind of hungry. It has always been my desire to lighten the burden of life for those less fortunate...." He went on, quietly, "I have always held that entertainment, of the right sort, is the most valuable aid humanity can have in its search for the alleviation of toil and boredom...." "There are many towns along the Venusian frontiers where no entertainment of the— proper sort has been available. It was Gow, our zoo-man—a big, ugly son-of-a-gun from a Terran colony on Mercury. His hands, holding the curtains apart, had thick black hair on them and were not much larger than the hams of a Venusian swamp-rhino. "She's the star attraction of our show, Mr. Beamish. I only hoped she wouldn't die on us, because without her we'd have a sicker-looking circus than even I could stand. I said tactfully, "We'd have to have at least a hundred U.C.'s."
output:  Performed tricks with the electric power the held in their bodies
options:  Performed with the dangerous Vapor snakes  Performed tricks with the electric power the held in their bodies  Swallowed electricty and performed with currents  Their appearance alone was their performance, as they had triangular mouths and scaled hides