About 7 years ago, my client was out chopping wood and saw some plumes coming down, which he inhaled, and soon thereafter had to go into the hospital. What happened?

This was an encounter with extraterrestrials working within a cloaked vehicle, so this was a direct attack to subject him to manipulation by the substance unleashed. This was not a chemical attack but rather a kind of aerosolized implant exposure. These are effectively nanochips that disseminate throughout the body and provide ways to deliver outside energies with pinpoint precision in various tissues on command. So this is a way of controlling the ongoing wellbeing of a person at a cellular level and is one aspect of the targeting they employ.