Scene Context: After Wayne falls, Les's first action is to check the pressure and structural integrity of Wayne's life support backpack.
Essence of the Phenomenon: In an EVA suit, the most critical issue is not a scratch on the white fabric, but damage to the PLSS—the system providing oxygen, ventilation, cooling, and the astronaut's core autonomy.
Scientific Basis: The PLSS is the heart of the EVA suit: it maintains pressurization, gas flow, thermal regulation, and internal life support loops. Therefore, after striking a rock, checking the backpack's pressure and integrity is the first and absolutely correct protocol response.
Current Limitations: Damage to the outer shell does not always mean an immediate emergency, but the true danger lies in depressurization or a failure within the life support loop. In the field, the difference between a "dirty backpack" and a "lethal puncture" is determined not by sight, but by system readouts.