why is he pushing his tongue forward as he's going for the higher notes, it's actually a very effective way to relax and loosen up the voice, so it's a very common problem with singers that as they're going for the higher notes, the tongue is trying to pull back and squeeze on them that's gonna tighten up the jaw tighten up the layerings and the voice overall, but instead if you think of pushing your tongue forward as you're going for the higher notes that'll get the tongue out of the way, it'll create more of a brighter sound and overall it'll relax the whole vocal mechanism。