I like those symmetric stress risers in the fuselage skin between each frame as the whole glider is distorted as the tank rolls out.
M22 Locust light tank leaving a Hamilcar glider. The deflated shock absorbers lowered the fuselage to the ground and allowed vehicles to exit without the use of ramps
p.s. The Hamilcar was constructed primarily from wood, mainly birch and spruce,* with fabric-covered plywood forming the skin,* and high grade steel reinforcement beams in critical areas.