They waited in the darkness, listening to the footsteps running up and down, beams of light flying along the street from the Death Eaters' searching wands.
" I'll try, " said Amy, for the advice suited her, and after a flurry to get ready, she ran after the friends, who were just disappearing over the hill.
It shows both the hectic movement of our minds, constantly wandering, recollecting, imagining, and its moments of stillness, of concentrated focus, of listening to sounds slowly turn into rhythm.
I'm a little tied up with my project deadline right now, but I can help you out on Monday to be tied up means to be already occupied or engaged with something else.