She appeared calm, and had a dazed look on her face.
With fluid movements, the woman in a short white dress waltzed on the metallic safety netting about one storey above the floor and "picked" at the "raindrops" coming down at her.
The incident happened in front of shocked passers-by at the departure check-in hall of Changi Airport's Terminal 1 on Saturday morning.
Videos and pictures of the woman, who is in her 30s, were posted on social media sites and quickly went viral.
Designed and built by a German team, the Kinetic Rain sculpture, touted as the largest kinetic sculpture in the world, is about 10m high from the ceiling to the netting. It took 20 months to create, and is made up of 1,216 bronze droplets. The sculpture was part of the terminal's $500-million makeover.
Ms Doreen Teo, an office administrator in her late 30s, told The New Paper on Sunday that she was at the terminal to send her mother off on a holiday to Taiwan when she saw the woman.
She said: "By the time I saw her, people were already crowding around her.
She was standing on the netting." She didn't see how the woman got onto the netting.
Said Ms Teo: "My first impression was she was doing some performance and I was looking out for the big camera. But there was none."
Instead, she saw a crowd forming around the woman and almost everyone was whipping out their cameras and clicking away.
She said: "She had a very calm face. She tried to pull a few droplets and the strings broke. She even managed to tie one droplet to her wrist." By then, there were police officers at the scene.