I think it would have been a bit much if Susan just marched over there on her own without prompting from Sarah herself. Also, the marching might have startled Ashley.
Also also, I like showing Diane being stealthy and/or RPG rogue-like.
Also also also, I like that Sarah, Susan's good buddy, took this initiative. Also to the fourth, SARAH LIKES PEOPLE TAKING THE INITIATIVE.
(Glares at Elliot.)
Wait, this whole party was Elliot's idea. That showed great initiative. Um...
(Glares at the sun)
MY EYES! WHY?! WHY DID I DO THAT?!