While slightly off-topic, this blog article from ABC News could save a life, especially with Pennsic coming. The article by Elisabeth Leamy teaches How to Use Fire Extinguishers Correctly: Think P.A.S.S. (You do keep a fire extinguisher in your camp, right?)
"I always thought it [an extinguisher] would be easy to use, and it's not as easy as you think," Kerri Braun told ABC News. Braun had recently attended a fire safety demonstration and was asked to demonstrate use of a fire extinguisher.
One of the things she learned was P. A. S. S.:
P: Pull the pin.
A: Aim at the base of the fire.
S: Squeeze the trigger.
S: Sweep side to side.
The complete article offers ten additional tips on fire extinguisher use.