How to tie a surgical knot

Portuguese reader Meri of Agulhas da Meri blog tipped us off to a great video tute on the Brazilian craft blog Superziper. Meri says,

Please, take a look at this video when you’ll have some time: it teaches how to give a surgical knot – it’s good when you want really to fix a knot – this knot doesn’t slip.

Regardless of your preferred language, the video is clearly understandable. Great tute, Superziper! And thanks for pointing it out, Meri!