"Kay, so the next part is the food," Marc said. "The food we move. We push it under the knife. But we're going to keep our fingers tucked under like this, see?"

Marc got one of the bigger pieces of apple that still needed slicing and demonstrated how he put his hand on it but with his fingers folded over. "That way if I accidentally get too close to the blade, I'm bumping my knuckles instead of cutting them off."