Yes, he's fine. He ran to get a fire extinguisher and when he opened the door he was standing behind it and it shielded him from the blast of super-heated air that rushed out. The neighbours told me today that it was pretty much over, start to finish, in a bit over 15 minutes.
Theo; we all have the same insurer up here, Insurance Corp. of British Columbia (ICBC). His insurance had expired but he needed to drive it out onto the street to open up the expanding thingies, so he bought a one-day policy from ICBC...
Even better, all the rubble is out on the street so the City came by today, took away the hulk and started cleaning up the rest of the rubble.
All he has to do now is tell his wife, before she gets home from a business trip and sees the blast zone.
The aforementioned neighbours tell me that the two propane tanks venting off were pretty spectacular!