Ianto teasing Jack about him trying to be intimidating. -
Ianto jones: Just us… in this room… for as long as it takes. Terrifying.
Captain Jack Harkness: Really?
Ianto Jones: Absolutely. Shivers down my spine.
Captain Jack Harkness: You don’t look scared.
Ianto Jones: Well, it… passed.
[Jack raises fist in a mock threatening manner and growls]