The lifting mechanism pushes the moist air upward to a point in the atmosphere where the thinner air can no longer hold the moisture, at which time precipitation forms and falls to the ground.

FORBES: Venezuela: Recent Rain And Claims of Cloud Seeding

Leandro Erlich's "Stuck Elevator" (2011) is more complex: A freestanding box, about the size of an elevator shaft, it reveals, through an open door, the elevator's lifting mechanism and, through a gap at the bottom, the interior of the cabin, with a newspaper on the floor.

WSJ: Too Clever by Half | More Real? | Minneapolis Institute of Arts | By Peter Plagens

One difficulty was finding a mechanism that would lead to the immediate lifting of a tribunal's injunction that had prevented BP and Rosneft from swapping shares.

ECONOMIST: The British oil company��s Russian deal is not dead yet