When Dieter De Leus first mentions he has to go to the toilet, the surroundings reveal that he is in Lichtervelde (you can clearly see a billboard for 'De Batjeshoek'). According to the course schedule, this would be around 11.30. When he actually goes to the toilet, it would be around 13:30 (they are mentioning the first hills are coming up, this is in Kluisbergen around this time). It is suggested that it takes at most 15 minutes before they stop, not 2 hours.