When searching in a document, it's nice how the window view gets centered on the search term (when the search term is further down the page, out of view from where you started).
However, when scrolling with the mouse, if one scrolls all the way to the bottom, you end up with a mostly-blank window, with only the last line showing at the top. It would probably be more useful if, when scrolling all the way down, the view were left in the same way as if a search had landed you at the last line of the doc (that is, with the last line somewhere near the middle of the window). Or possibly with the view centered, like what "Scroll to current line" does.
---John