@killick
Long ago, a friend showed me a cool way to tie my shoes. It results in the same knot that everyone uses (I checked with a topologist friend. Like you do.) but looks cool doing it.

So if I'm among people I know and need to tie my shoe, I'll usually say, "Have I ever demonstrated shoe-tying for you?"

And once this happened with an acquaintance who was, unbeknownst to me, a competitive sail racer, and his enthusiasm was A LOT.