CAMPING -- "Bear spray left in car. Becomes bomb. Very impressive."
That's a post with the photo above from Hal Herring in Montana, who performed an unintentional science experiment by leaving a canister of bear spray in the back of his Subaru open to direct exposure to the hot summer sun.
Manufacturers say aerosol cans can burst above temps of 120-130 degrees. But the main thing is that the canisters should always be covered -- in a duffle, in an uncooled cooler, wraped in a towel under the seat of a car, but NEVER left to the full intensity of the summer sun in an enclosed vehicle.
"Check out the super shred on that bear spray holster...reckon there was a little force there?" Herring notes.