*shudders* VERY high on the list of things that almost scares IronRaven out of his wool socks.

If there was a leak, it didn't even have to be in the tent, but outside. As others pointed out, propane is heavier than air, and could have even been trapped in a pocket under the tent. One static spark, and FWOMP!

Nylon and polypro are great things, but never forget that they are petrochem products that we think of solids, but they are fluids like glass is. Wait, the other high viscosity petrochem product most of us know of if napalm. I use lots of nylon, but I never forget what it is.

You know... My BoB has two small butane/propane cannisters in it, and it lives under my bed. Under the head of my bed. Great.....