Methought I heard a voice cry "Sleep no more! Macbeth does murder sleep," the innocent sleep, Sleep that knits up the ravell'd sleave of care, The death of each day's life, sore labour's bath, Balm of hurt minds, great nature's second course, Chief nourisher in life's feast— Act 2 scene 2
As a response to 7, 10 was holding it in so he could see all his companions again as himself and could do no longer when he reached the TARDIS. The build up of energy made it explode out of him whereas with 9 he just let it happen.
~"Somewhere tonight, on a winding road, is an empty heart with a heavy load, looking for a way to a better life. Let YOUR LOVE REACH OUT somewhere tonight." If you were this person, won't you hope and pray that someone helps you? Let's open our hearts to them.