Diana Holmes: How did it do that?
Ianto Jones: It's automatic. It knows you're there.
Diana Holmes: But how?
Ianto Jones: There are wave-bouncing detectors which emit high-frequency radio waves and then they throw reflections -
[Diana examines the automatic doors than looks into the store]
Diana Holmes: Bananas...!
Ianto: Of course bananas are far more interesting.
Ianto Jones: It's automatic. It knows you're there.
Diana Holmes: But how?
Ianto Jones: There are wave-bouncing detectors which emit high-frequency radio waves and then they throw reflections -
[Diana examines the automatic doors than looks into the store]
Diana Holmes: Bananas...!
Ianto: Of course bananas are far more interesting.
Diana Holmes : How did it do that?
Ianto Jones : It's automatic. It knows you're there.
Diana Holmes : But how ?
Ianto Jones : There are wave-bouncing detectors which emit high-frequency radio waves and then they throw reflections -
[Diana examines the automatic doors than looks into the store]
Diana Holmes : Bananas...!
Ianto : Of course bananas are far more interesting.
http://www.tv-quotes.com/shows/torchwood/quote_11545.html