Geez, hope everyone is okay. I'd much rather suffer broken bones than severe burns.
I've actually seen something similar happen years ago at, wouldn't you know it, a bachelor party. Thankfully nobody was seriously hurt (one guy lost the hair off his leg but that's about it). Drunk guys, wet firewood and a gas can don't mix. A couple of the guys were trying to get the bon fire going but it had rained the night before on the firewood so they were having trouble starting it. So the one guy thought it would be a good idea to pour some gas on it. I guess he thought since it wasn't going it would be safe (or didn't think at all, more like it) but the damn thing was smouldering and before we could say anything to him he pours the gas directly on the fire pit. The thing goes up and now he's holding a gas can that has the spout on fire, pouring flaming gas all over the place, running around in circles panicking. We're screaming at him to drop the damn thing but he thinks he'll just run down to the lake (which was about at least a 50 yard walk down a twisting path through trees, and it's pitch dark out there at this cottage), he makes it maybe 20 feet before dropping it (thankfully it burned his leg a little which made him drop it) and I ran over and threw some dirt on it. We all could have been hurt (not to mention a forest fire/multiple cottages burned down) by one person's lack of common sense.