Growing up, I remember throwing my dog food. It was just amazing, the food would arch up, intersect with his mouth, and just... disappear.

except grapes. They would arch up, intersect with his mouth, and... hit a tongue and roll off onto the floor.

turns out grapes (and raisins) are toxic to dogs. How they figure that out during the millisecond encounter with the tongue is mind-boggling.

oh, another one: one time when young I gave my dog a corncob to chew on, my theory being it would be like gnawing on a bone. and it he just ate it. it disappeared. we monitored him, he was fine, but scared me to death.