Backbone Event triggers coordinating between different views
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So I have a main view that has a collection of objects inside of it.  The objects are going to be sliding left and right in a carousel.  

I have an event that binds on mousedown *inside* of the main view to track how far they roll the mouse during that time.  However, if they roll off of main view element while still holding down the mouse, I still want to be tracking distance and also the moment when the mouseup event is fired.  

What would be a good way to integrate a UI logic like this that starts with a local backbone view but has events that trigger off of the element?  I feel there are some traps, especially in terms of future legibility if I were to spread out the functionality over global and local views.