Used an inner shadow on the climber, and gave it a red hue, to give a glowing effect from the flamers surrounding him.
step 5 of 6
Changed the source image layer blend mode to vivid light, and the flames came through.
step 6 of 6
Duplicated the flame layer several time, transformed and scaled each accordingly, and placed them in various spots at the bottom of the image, to try and create the feeling of climbing out of the flames. That's it.