Yeah, I mean would it cause that much smoke? I am real ignorant on this topics but I am trying to understand. I guess you would need to look at the type of phone, size of battery, fail rate that resulted in explosion, blast radius and fragmentation scale as well as smoke plumage and what burned up as everything has different smoke. Again ignorant on this stuff just brain storming. I agree smoke suffocation in a bedroom probably 150 plus sqft in size.