Dwayne states that holding a pair and matching a card on the table is called trips when it is actually called a set.
Trips is when you have a pair on the table that matches one of the cards in your hand.
Eugene [Nigel Planer] uses special sunglasses to read otherwise invisible "ultraviolet ink" marks on the backs of playing cards. An old cinematic trope, this is nonsense. Glass cannot convert a photon from one wavelength to another while preserving the trajectory of the original photon.