It's how I do it but we have a very large and heavy duvet; this technique (that my mom showed me once and I then promptly forgot) is a lot less impactful, since

It's how I do it but we have a very large and heavy duvet; this technique (that my mom showed me once and I then promptly forgot) is a lot less impactful, since the shaking kinda requires you to lift and shake the whole thing.