There is one cool thing certain Hybrids can (theoretically) do, which hasn't been advertised much. That is, power your house.
The electrical engine/battery in Hybrid, is more than enough to run all your major appliances, until the power goes back on. (Basically something like a home UPS)
Since said hybrids recharge their battery from a fuel tank, once said battery run out, it would start to do so, essentially acting like a fuel based electric generator.
A Chervolet Volt for example, will almost be ideally suited for that, because it has a huge battery that can store 16kWh. An average house uses about 30kWh per day, so you could run your entire house for almost half a day, on the battery alone. And on top of that, it has an engine and fuel tank as well. (capable of recharging the battery)