Nested iframes on that last one. Do you remember sites that would popup hundreds of popups - not virus/porn sites, but design sites that would orchestrate a variety of images in the popups? I recall iframes that would bring up more iframes as well. I wonder where we'd be if we'd followed these routes instead.

Had a chuckle at the "weakness" of that last one. Pretty sure "ugh, I just work too hard!" is everybody's go to weakness.