Ok, sooooo... in hindsight... this seems pretty common sense.

Here's the deal... you definitely don't want to leave a 40gram "Big Air" inflator cartridge laying in the passenger seat of your vehicle when the forecast calls for temperatures in the 90's. That sucker blew up and shattered the $350 windshield I had replaced about 4 months ago.

When they say not to expose to temperatures above 120 F they definitely aren't kidding!