Quinn's Human Interface Subtleties
Lucas Marks stashed this in User Interaction
Oldie but a goodie. I especially like the diagonal dragging on "Hierarchical Menus". Never noticed it before, but it's awful useful. I remember having some issue on http://pc104.org/ with 2nd level menus. If only I'd know about this trick!
Still works like this on my modern Mac, wonder if Windows uses that trick...
Stashed in: Usability!
Wow, it's been five years since I've used Windows, so I have no idea if they use the trick now.
I did have a lot of fun exploring Quinn's Human Interface Subtleties page 2.1: