[Astroboy]

Since this is emergency, and I don't know if this apply to H2's key cylinder or not... but it may help.

I used to drive a Jeep, and its key cylinder was known to fail after a few years of usage from wearing out, gradually leaving the driver with stuck key that won't always turn to start the engine or be taken out.

The immediate and temporary solution was to USE A BLUNT OBJECT to KNOCK THE KEY INTO THE CYLINDER by tapping a few times.

You don't need much force. Just hold something and tap it few times with your wrist.

In my case, what I used was a beer bottle. I kept an empty beer bottle in my cup holder solely for this purpose for a several months until I had it fixed properly. Now come to think of it, that was not wise and I could have gotten into a big trouble.