If you can trap and drown a fly, you can then cover the dead fly with salt, which will suck the water out of the fly, and bring the “resurrected” fly back to life.
The relevance here: it is surprisingly difficult to drown a fly, because the weird hairs around their bodies create an air bubble around them, which protects them. A fly in a bubble of air can survive for at least 20 minutes underwater. Released, they will float to the surface inside this bubble and fly away.
Don’t ask how I know.