Waterdrops
Here are some water and milk drop photos made using a solenoid dropper ...... and others
The pouring wine photos were taken using an infrared sensor to detect the falling wine and trigger the camera.
For the jumping paint photos a piece of black binliner was taped over a loudspeaker. Drops of water paint were added, and the the speaker was "pulsed" using an app on my tablet. Camera triggered by sound detector.