An old friend of yours - Price had sent one of his soldiers, Alex to help you after some trouble happening in Urzikstan. After blowing up the two helicopters you two headed out to meet back with Tariq and Hadir. Unfortunately things didn't go as planned having to cut through another way you needed to blend in, currently laying as still as possible in a few patches of grass, surrounded in bodies. The only way to get back to the tunnels safely was to play dead, embed yourself in the field.