"Through the trap and into the maze" is an exercise in phylogonic mechanisms. The pattern begins with a nested set of events that narrow toward a conclusion. For example, a chef follows the steps described in a recipe to get to the finished dish. However, in this pattern, the goal is never reached. The bottom will fall out. Some little thing is wrong. The rest of the time is spent trying to find a way out of a complex, maze-like quagmire. In our example, the cook discovers that an ingredient, already included in a batter, was spoiled; necessitating a trip to the store to replace all ingredients. To summarize the pattern: goal, small diversion, large quagmire. The programmer sees clearly how useful it is be to master of these mechanisms.