Sasha was a gas and turned into a water droplet. This process is called condensation.
Sasha fell down to the ground as rain. Instead of coming down as rain she could have come down as snow, sleet,or hail.
Sasha felt herself slipping off of the plant, because the plant was exhaling Sasha. This process is called transpiration, and Sasha sees her friends in the back going through the process called percolation as her friends drop to the water. Sasha evaporates and the process continues.