Revealing mistake: When Del sees Denzil skating along and tells him that he's got his money (the butterfly), Denzil gives him a high five and crushes the butterfly. If you look at Del's hand when Denzil goes past him, you can see the butterfly is not crushed at all.
Only Fools and Horses (1981)
1 revealing mistake in As One Door Closes - chronological order
Starring: David Jason, Roger Lloyd Pack, Nicholas Lyndhurst, Buster Merryfield
Genres: Comedy
The Long Legs of the Law - S2-E1
Revealing mistake: At the very beginning of the episode, Leonard Pearce is waiting for the cue for his character to start looking for his teeth. He's standing in the living room, between his room and Del and Rodney's room. (00:00:25)
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More quotes from Only Fools and Horses
Trivia: They actually used Bournemouth beach to shoot all the beach scenes instead of Benidorm.
Question: What exactly did Del and Rodney's mother die of?
Chosen answer: An apparent long string of illnesses.
Answer: Joan Mavis Trotter (Nee Hollins) was an unseen character in Only Fools And Horses, having died in 1964, 17 years before the series began. She died of an alcohol related illness due to both her sham marriage to Reg Trotter and being hit hard by the death of her secret lover Freddie "The Frog" Robdal.
Her maiden name was not 'Hollins'; that is the name of somebody "Auntie Rose" mentioned when the Trotters believed they were staying with their auntie, but it turned out she was completely unknown to them.