A few years back, I had the in laws are around for Sunday dinner. During dinner, my brother in law (he was and still is, an annoying rude obnoxious pr!ck) began choking on a pea. After a few hard slaps on on his back (funnily enough, everybody around the table had a go!), it still didn't dislodge it, so I performed the Heimlich manoeuvre (abdominal thrusts) on him. It took a whilst to get under his blubber gut to get it right,, and crucially I had just been refreshed on a first aid course the week before, where we had gone over it in detail. Managed to clear the obstruction, and he sill lives to be just as annoying today. His wife has still not forgiven me : ). Moral of story....go on a first aid course if you get chance.