Question: I'm intrigued if anyone knows what the experiment was that Doc refers to at the start. He says "my experiment worked - all the clocks are exactly 25 minutes slow". The only thing I can think of is that Doc loaded them all into the time machine or something similar - is there any official answer, or is it just a random comment?
Gaz
13th Jun 2003
Chosen answer: It's just a random comment, and I suppose is also an early indicator that Doc Brown is performing experiments involving time. Whatever, it's certainly nothing that bears any relevance to the rest of the film.
Gaz