Battery relocation- Does anyone know of an actual hydrogen sulfide explosion incident?

The insights and stories are valuable here. Thanks to all for sharing this.

You definitely want to vent that stuff out of the trunk. Does your car have a firewall between the trunk area and back seat?

The kit is an NHRA Legal sealed box that I bought from Summit. The battery is anchored with a substantial bracket that goes through the box, through the floor of the trunk. I believed this was enough. Are you saying that people who install trunk mounted batteries also install an sheet metal firewall? If so, I've never seen it...not saying there isn't a good reason to have one.

With this statement in the OP, I'd say no firewall.

I was talking about all that hydrogen sulfide that is probably trapped in the seat cushion...
Doesn't anyone appreciate a good fart joke anymore? :D