THOUGHT THIS FROM THE MOMENT THIS HAPPENED. Not to mention the vortex manipulator that River is going to use to go visit them in New York... wtf Moffat.
"I feel like Smith and Tennant should be switched, because 10 puts way more stock on loyalty than cleverness, but 11's whole life is like one big, silly, super-intelligent improv." <-True, and the Master would be Slytherin. :D
they both had to laugh, because they know that unknown, the monsters, the running is the best part. No chance is either of them going to give that up. No way they're just going to ignore whatever is going on here.