Choking is bad

I cut up some apples last night for Andy to feed himself during dinner and apparely cut up apples need to be really cut up in order to make it down without getting stuck. He doesn't chew at all (of course, although I didn't put that together) so Bjorn was watching as he proceeded to start to cough because he couldn't get a piece up or down. It wasn't stopping Andy from trying to keep putting more in his mouth. Bjorn smacked in on the back and he was fine moments later, but it was pretty scary for us.