DIY Laser Microscope. Uranium writes -

After witnessing the image of a mosquito in a laser beam outside, I decided to investigate the phenomenon further. I started by locating scuzzy water. Ponds lacking, I decided to take water out of the bowl of my 6 year old spider plant. I then filled a syringe and hung it above a laser so that a drop of water, almost ready to fall, was in the beam path. Below is the incredibly complex apparatus involving a book, sticky-tac, a random bottle, a 250mW laser, and a syringe. Here is the thread discussing this on LPF if you’re interested.

The cat seems to like the bug-filled water