For only fools and horses fans, what is your favourite moment of all the episodes?

My favourite moment is from the episode "Go West Young Man" when Del and Rodney go to a nightclub after accidentally trying to chat up a couple of blokes in a gay bar. They meet 2 girls who Del is trying to impress by saying that Rodney is a professional tennis player called "Hot Rod" so they get onto the subject of playing surfaces such as astro turf and gr. One of the girls says to Rodney, "What do you prefer Rodney? astro turf or gr?" to which Rodney replied, "I don't know i've never smoked astro turf"