I've worked with Shannon quite a bit and I've just realised I never actually asked her ... why Morgan Freeman?
Knowing Shannon I expect the answer would be simply "because he rocks", which in fairness is true.
Here's a few from a nice moody shoot we did a while back in my old apartment in Dublin city centre. I used to love that place. Even aside from the apartment it just had great views of the city and there were some great places to shoot all over the building and roof area.