The 8-foot-long beast was built by 19 prop specialists over the course of eight weeks (All photos: Splash/All Over Press)
The "animal" was operated by two puppeteers inside the bear who practiced for weeks (All photos: Splash/All Over Press)
The purpose of the stunt was to give people a realistic experience of what it may feel like to come face to face with the largest predator mammal (All photos: Splash/All Over Press)
The puppet also took a ride on a London Underground train(All photos: Splash/All Over Press)