In video clips shown at a science conference, Collett showed that Bush bites the inside of his mouth if he gets distressed while Blair raises his eyebrows when he is trying to look agreeable.

• 柯列特在一个科学研讨会上播放的片段显示，布希不开心的时候，会咬嘴巴内侧；布雷尔则会在想要看起来可爱时挑眉。