A baby with a tongue thrust reflex will push anything that isn't milk right out of its mouth with its tongue.
What helps a baby not to choke is the ability to move food around their mouths, particularly from back to front but not out of their mouths.
Here is a tongue thrust reflex in action for reference. With dd, the reflex went and then she started exploring food and practising moving it round her mouth. One seemed to be a reflex, the other learnt.