I suddenly remember my Advance Statistics teacher told us about Alternative and Null test and it goes like this...
Teacher: The non shaded part of the graph is called the acceptance region.
Me talking to my classmate: Acceptance region.
Classmate: (rolling her eyes)
Teacher: and the shaded part of the graph is what we called what?
Some witty classmates who wanted to learn mathematics: Rejection region!
Classmate: O.o
Me: Rejection.
Classmate: Enough!
Teacher: what is the shaded part again?
All except me, my classmate and the intelligent people of the class: Rejection Region
Classmate: stop! It hurts.
Me: Don't worry about the Rejec-
Classmate: STOP OR I'LL DO ALL THAT I LEARN FROM MY TAEKWONDO CLASS!!!
Me:... Rejection region...
Classmate: (crackles knuckles)
Me: Oh oh.
And cause? My back hurts really hard... For being such a teaser. -.-