/disappeared admins show fall landing particles.

[Anna Bakker]

When falling from a height in minecraft onto solid ground they create a circle of particles where they land, the higher the fall (or longer in the air) the larger the particle spread. This also happens when you fly around in the air then go down on the ground. This still happens even when the player can't take damage or if a admin has /disappeared.

[Anna Bakker]

However sprint and swimming/splashing particles can not be seen.

[Riot]

This obviously has nothing at all to do with scripts...