The CBC has seen the enemy when it comes to delays on the Toronto subway system and he is us. And it seems likely that students of human behaviour will find it quite easy to understand. The TTC says that most of the things that cause delays are unpredictable. Depends on what you’re expecting, we say. The appearance of passengers who are drunk and disorderly, people walking on the tracks for the fun of it and litter causing fires are not unknown to the species. Read it and weep (or laugh).