Wow! Sure shows why SP created the "Tunnel Motor" variant of the SD40 & SD45.
I gotta say our Tunnel Motor, ex UP 8702, exx SSW 8375, (no, it wasn't in the video consist - I looked!) doesn't smoke like that. Of course, we don't run it through tunnels in run 8 at 10 mph either. It does get quite a bit of run 8 time at 10 mph, though.
An EXCELLENT unit and always amazes me with what she can pull!