"Water droplets" was a set that involved a great deal of compromise.
The easy path:
Throw money at it. (Electronic sensors, hydraulic drop mechanisms, ultra quick flashguns, etc., etc.)
The more difficult path:
Use what you've got.
I chose the "use what you've got" approach
A bowl of water, dyed with red food dye, a syringe full of milk or water, a macro setup.
I already own dual Yongnuo flash units, so positioned them close to where the water would drop.
After some experimentation, I found a setting that allowed for a reasonable exposure while using the flashes at only 1/128th power.
The power setting allows for an ultra short flash time (I am assured it is somewhere around the 1/24,000th second area)
I would start the water droplets (Or milk, whatever was in the syringe) and could then get 15 or so high speed flash images while it did this before the flashes would need time to recharge
Because there was no synchronisation, the results were random.
I then started dropping items into the mix (Pine Cones, magnets, etc.) with the same setup.
Hundreds of images, culled down to the final images.
Well. Here goes. Nothing ventured, nothing gained.