I spent part of my weekend catching up on some TED Talks, and was floored by a 3 minute presentation by Terry Moore entitled "How to tie your shoes."
It turns out we have been brainwashed our entire lives. Someone, way back when, came up with the shoelace, chose a knot to tie them with that, apparently, has a "strong version" and a "weak version", and then taught everybody the weak version. Mr. Moore is the whistleblower! This is, literally, 3 minutes that could change your life.