Followup - the Honda did not start

But that's okay - it gave me a chance to use that nifty pocket-sized jump starter that I bought last year. It worked great: just clamped it to the battery, pushed the on button and turned the key and vrrrooomm. Now that it's above zero, the car starts on its own, but I guess it's time for a new battery. It is more than 5 years old. 

I used the jump starter again today on a friend's car. It ultimately worked, but did not go quite as smoothly. The jump starter successfully turned the engine over, but it wouldn't catch and wouldn't catch and wouldn't catch. After multiple attempts, the status lights on the little jumper were starting to show distress. But before it ran out of juice, the car FINALLY started. Not sure what the problem was. The engine did smell a little gassy by the time it started, so maybe it IS possible to flood a modern fuel-injection engine. Or maybe some other issue entirely - dirty fuel injectors or weak spark plugs? Anyway, it started and I hope it kept running long enough for her to make it to her favorite garage. 

ETA: Oh yeah, I guess you can flood a fuel-injected engine.