throwing

I'm seeing this quite a bit lately. Basically it looks to me like the serve throw is directed towards the head and is obscured by the head right before contact. Is this fine? Obviously it's done purposely...it's giving the opponent less time and fewer clues as to what spin is coming in...

Hi people, I've been practicing some serves recently and very often I have this problem where I throw the ball in the air, eye level, but the ball is floating. So there is this holy crap moment where is it gonna land? I've tried to replicate it but so far unsuccessful. I stopped breathing during...