Harley's sudden, unexpected and highly out-of-context outburst, initially cased Eddie to flinch with surprise. Gripping his cane tighter, he suddenly realized she was talking to herself, and while he knew Harley Quinn had more than one screw loose, he didn't realize she was the type of Arkham inmate that talked to herself.
Giving Harley a calculated look, his brow deeply furrowed, Eddie was as worried about her and he was about the safety of himself and the others. "Are you sure you're alright to fly this plane?"