A few drops trickled through a crack in the boards.
A drop of sweat trickled into her left eye.
Saetan watched the drops of rain trickle down the window.
From the corner of her mouth a few drops of blood were trickling.
As he glanced up, several drops of cold water trickled onto his face.
A drop of black blood trickled from the demon and splashed onto the floor.
A single drop of blood trickled from his lips.
A drop of black blood trickled from the side of his mouth.
The blow had burst the skin, and a drop of blood trickled over the temple on to the cheek.
A drop of sweat trickled into his right eye.