Crazy gramma?

Thanks guys,thats reassuring to know.Back in my fw days,if you seen a fish doing a corkscrew and then swim upside down for a while,you knew to get the net ready,he'd be doa by mornin,lol.This is my first gramma and for a very common fish,he's taking me a little bit to get familiar with his swimming "habits".I personally think he can sense my blood pressure and has fun with making it go up and down

 

I think they do until you understand their habits and your BP stays steady.