Why does she have to have Rose's chewing lip habit? Ten conceals most of his hurt keeping Bulma alive. Placing the sonic screwdriver back inside his suitcoat Ten grabs her hand again and makes a run for the TARDIS and takes out the TARDIS key and a few feet from the door points the key outwards, unlocking the TARDIS - shoves Bulma in first and slams the door behind himself and stands pressed again the TARDIS door,

"Well - that was easy."