Baiting his line before casting it out once more, he thinks about that for a moment. "You know, that wouldn't have been the first time. I'm a SEAL, Danny, we're trained to swim in shark infested waters."

He's trying to be reassuring as he can hear that 'something' in Danny's voice, even if he's not fully sure as to why it's there or what it is. Concern? Maybe... The idea that Danny was concerned for him warms him and he can't help but smile.