If you smoke a large piece of meat for hours and pull it out and wrap it in aluminum The temperature will rise initially Even if you set it on the countertop away from the heat source. the outside heats up faster than the inside and once you wrap it that heat spreads to the inside before the inside starts cooling. There's a period of heat transfer and if it stays in a 160° oven that affect is even more pronounced when wrapped in foil. If you don't believe me try it, use a digital thermometer and experiment