Guess you missed the warning label: "Do NOT eat cheddar cheese rice cakes while alone".
...and now as a public service:
The Heimlich Maneuver for CHOKING
When you choke, you can't speak or breathe and you need help immediately. Follow these steps to save yourself from choking:
1. Make a fist and place the thumb side of your fist against your upper abdomen, below the ribcage and above the navel.
2. Grasp your fist with your other hand and press into your upper abdomen with a quick upward thrust.
3. Repeat until object is expelled.
Alternatively, you can lean over a fixed horizontal object (table edge, chair, railing) and press your upper abdomen against the edge to produce a quick upward thrust. Repeat until object is expelled.
See a physician immediately after rescue.
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I'm glad to hear that you didn't panic and managed to save yourself. Lots of people die every year in such bizarre incidents.
ADG Webmaster