big shot mode

hi guys very new to this have been checking out the pics on here very impressive just like to no more about this big shot mode and is it available to use in forza 6 and if so how do you use this mode any help and pointers is much appreciated cheers in advance

All photos taken in fm5 and fm6 are classed as big shots, the bigshot link in your gallery applies to earlier games, FM4 and before.