Hi-fidelity prototype proposal for an existing product.

A data visualization where a bar chart of faces flies out showing the details of individual faces.

Tourist app

If you need to get the Y position of a vertically scrolling container, create a text box. Then on the container scroll trigger, set a variable that evaluates the numerical callback value from the event (Y position). Then add a callback that changes the text property of the text box by reading from the variable.