During transport of a shooting victim, you see tracheal shifting to the right and progressive neck vein distention. Which finding would you MOST likely see accompanying these signs to indicate a tension pneumothorax requiring immediate attention?
• Pupils suddenly become unequal and unresponsive to light
• A change in skin color and temperature from warm to cold.

• Lung sounds are obviously absent on the left side of the chest.

• Slight increase in systolic blood pressure when re-assessed.