Zombies! RUN! (Managing Page Transitions In Backbone Apps) 15 September, 2011. It was a Thursday. One of the common issues or questions I see for Backbone.js goes something like this: “Whenever I hit the same route more than once, I end up getting seeing this call being made multiple times. It seems to accumulate another call every time I hit the route. What’s going on?” or “I’ve noticed that my v