The comments from Craig Murray's EK photo:
A6-EMK Showing you the comparison between human (me!) and RR Trent engine as fitted to this Boeing 777-200. A good way for those of you that have never been able to stand next to an engine and fully appreciate just how big they really are. Yes, that is a me standing in the engine, the marvels of modern technology made this shot possible!
It's a bit ambiguous - I always took the last sentence to mean that the shot was created using photoshop or something else, but I guess he could be referring to the engine as the marvel.. oh well, doesn't matter much anyway