If the first two posters were any indication, one can never know where Ben Stiller's title character from The Secret Life of Walter Mitty will turn up next. After walking on air and standing on a shark, the third poster finds this photo manager taking a coffee break atop a massive mountain. Where do you think we will find Walter next? Stay tuned for the latest in this series of posters for 20th Century Fox's adaptation of the James Thurber novel, in theaters Christmas Day.