Amazed, Stan watched Alex throw his legs around the half-column. Hugging the stalactite, he applied the drill to the strongest section, just above his head. The hanging rock shuddered. Cracks appeared, crisscrossing the pillar at Alex’s midriff. If he fell, he would carom off some toppled scaffolding straight into the supercold jet.

Stan withheld breathing as Alex drove the bit, tested it, and quickly passed a loop of cable through the grommet, giving it his weight just as the greater part of the stalactite gave way, falling to strike the debris below with a crashing noise. The crowd shouted. Dangling in midair, Alex struggled for a better grip while everyone below saw what the tumbling stone had done to his inner thighs. Bleeding runnels dripped through the remnants of his tattered trousers, joining rivulets of sweat as he strained to tie a loop knot. Encountering the roaring gas, the bloody droplets exploded into sprays of reddish snow.

Stan breathed again when Alex slipped his shoulders through the loop and let the cable take his weight. Still gasping, the young man turned and shouted over the noise. “Slack!… Pump!”

Two of the techs holding the cable looked puzzled. Stan almost rushed over to explain, but the Maori engineer caught on. Gesturing to the others, he began letting out more cord and then pulled most of it back just before Alex’s feet neared the icy jet. The process repeated, letting out rope, pulling it back. It was a simple exercise in harmonic resonance, as with a child’s swing, only here the plumb was a man. And he wouldn’t be landing in any sandbox.

Alex’s arc grew as the tether lengthened. With each pass he came nearer the supercold shroud of liquefied air, a blizzard of sparkling snowflakes whirling in his wake. He called down to those manning the straining cable. “Fourth swing… release!”

Then on the next pass — “Three!”

Then — “Two!”