I just noticed something with Chico.......

I just finished playing Ground Zeroes again and watching the ending I noticed something with Chico. The first half of the helicopter scene is fine but it's when Big Boss returns back to the helicopter, and after Kaz's iconic "Damn fiddle"..... when kaz goes to wake up paz.... pay attention to Chico in the back.. he steps on both feet, which should be impossible since both his Achilles heel is bolted. Skip to 8:05 to see and let me know if I'm just crazy.