Leeloo clearly did not understand the reference. Her head jerked back and she took a few quick steps back from both John and the building. Something changed in her - a strange sense of predator floating about her but never quite settling. She mumbled something in a strange language - something that had no hope of translation here.
"We should not go in."
The assessment wasn't based on anything she saw, but rather what John had said. She was not afraid to face enemies, but neither did she enjoy it when it was possible to avoid it.