Finn was still laughing when Rose covered her eyes with a pillow thinking he was making fun of her for being scared of an insect without thinking there might not be any cockroach at all.
Finn spoke upon realization, "These movies and dramas are reels, the real one stands on the bed instead of going behind me."
'Reel- real?!' Rose lowered the pillow to see nothing on the floor and Finn was pranking her. Her hand instinctively moved and threw a pillow on him before she could even realize.
Finn was swift to hold the pillow before it touched him and looked at her spellbound. Actually now he understood Rose was afraid of him in the past, maybe because of his demeanor with all. And why Aria always told him to treat her good, you might not get a better one than her.
However, he didn't show his newfound analysis of his new girlfriend and saw her with his sharp menacing gaze.