It's worth noting that hydrogen fires burn bright and quickly, but tend to not be very dangerous to people. Gasoline and batteries are heavy and tend to stick

It's worth noting that hydrogen fires burn bright and quickly, but tend to not be very dangerous to people. Gasoline and batteries are heavy and tend to stick to surfaces (including people) when they burn, almost like napalm. Hydrogen rushes upwards, away from people and surfaces, as it burns, and is generally quickly exhausted.