* The explanation for the "Admiral" (the giant orange and yellow art piece hanging in Quark's Bar). Gul Dukat, who put it there, believed it was a portrait of a Tholian Admiral. It wasn't. Rom identified it as erotic art, representing a male Tellarite's reproductive organ. The particular abstract representation Dukat had chosen was that which hangs outside "Tellarite mud-pits of ill repute". Whevever Dukat brought his latest mistress to the bar, he would always gloat about the "portrait", causing Quark and Rom to raise their glasses to "the Admiral".
* After a conversation with Vic, Bashir tries to explain the expression "Buy the Brooklyn Bridge" and it meaning of gullibility. Odo derails this buy asking if it's the same Brooklyn Bridge that's currently on The Moon. To which Bashir says yes and explains it was the great engineering project of the 22nd Century, completely missing until Odo points it out that this means that eventually someone ''literally did buy'' the Brookyln Bridge.