That's a pretty cool tip! Thanks for sharing.
I've watched a handful of anime series these past two weeks without subtitles. Sword Art Online, Death Note, and Fullmetal Alchemist: Brotherhood, to name a few. I'm on the same page as you; I pick up one one out of every twenty or so spoken words, which I think is great progress.
I've found that watching and listening to anime without subtitles really helps to reinforce my understanding of the language, the context, and the speed in which words are spoken. Though, it should be noted that one shouldn't rely solely upon anime for improvement. Give live action Japanese films and newscasts a try, too.
Sheegoth are large predatory creatures native to the frigid Phendrana Drifts region of Tallon IV from Metroid Prime.