Originally posted by: Acanthus
You definately can, i knew i kid that inhaled a blade of grass through his mouth and it got lodged in a lung. He had uncontrollable coughing and vomiting for 2 hours before they performed surgery to remove it.
True, the body will do everything it can to expel it.
But when you choke something is lodged at the junction of your windpipe and the stomach tube (don't recall "real names). This is why the heimlich works so well (I've had to do it a few times, it works) - it uses the air in your lungs to push the object out so your body can cough it up.
Also if somebody is coughing, let them cough it out. It's when they can't breath that you do a heimlich on them. Turning blue means you need to act NOW.