This is fairly out there, but we sometimes have pages which exist in two or more logical places in the page hierarchy.

For example, when viewing ad-hoc triggers for a particular workboard column, you could arrive there via:

Projects > Triggers > Trigger 123

...or via:

Projects > Differential > Workboard > Column: In Progress > Trigger

We currently have to pick one, and often end up with a sort of mashup of the two paths. This is "mostly fine".

But we could show both:

Projects > Triggers > Trigger 123
         > Differential > Workboard > Column: In Progress > Trigger

But even typing that out makes this seem like a bad idea?