Susan caught Donna's eyes with her own, and with a nod of her head directed Donna to look over at her arm as she held it out from her side. Susan let her arm go through the lamppost they happened to be walking past. "Its also a family thing that we don't pay much attention to walls if we should not care to. Locked in a mental institution? Hardly."
She looked away with a slight smile. "I'm not joking. Different universe."
"Through time and space with the Doctor? I believe I met the man. Young, sort of thin, wears a bow tie? Time and space ship went off and left him? You really need to keep that one away from sugar."