In the Kazakhstan mission, successfully complete the second part where you are on the bike chasing after the train. There will be an intermission sequence. During that sequence, Lara will take off her burning winter coat and toss it away. To see the glitch, successfully complete the game and get a multiple amount of clothes. Chose any of the clothes except for the winter clothes for the Kazakhstan mission. At the intermission sequence after the bike ride, Lara will take off an invisible burning coat.