In the TNG episode "Power Play" O'Brien, Troi and Data or inhabited by non-corporeal aliens wanting to leave the planet that's being orbited, the three are holding hostages in Ten-Forward which includes Keiko O'Brien and baby Molly, the trio have access to the memories and skills of their hosts and "O'Brien" takes something of a hostile approach to Keiko and Molly. At one point "O'Brien" looks at Keiko, holding Molly, and shouts "I gave you that!" Whenever I watch this episode I always think he's talking about the baby and kind of chuckle because it's just an unusual moment, especially since Molly's being fussy. But really he's talking about a bracelet Keiko is wearing as "O'Brien" goes up to her, takes her arm and studies the jewlery. Are there any lines in the series you always see/hear and kind of misunderstand or take until following lines/scenes sort of clarify things a bit, even if you've seen the episode several times?