they pretty easy to pull off id you have access to outside teh building and at teh point of entry to the buildng (lets say a window) you can pick up where that initial shot left off..

I did a couple of these for a corporate client here in Syd in pyrmont (96.9 radio where the walkway is jsut outside teh Anzaaac bridge entry) and took afew shots from outside, and zoomed into the window.. then i piked up the shot from that same window and continued internally.. workd a treat and people freaked out a bit when tehy saw it as they werent expecting that kind of continuity.