Zak stood outside of konohas gates walking past a few tree when he felt a pain from his curse mark and he transformed into a beast like monster

I talked to Death and told him to wait for his new body.
The earth shook and I looked around for signs of the cause.
I blinked my left eye and activated my sharingan.
"Zak?"

A few tree's were knocked down from a swing of a giant arm

Using a transporting jutsu, I appeared a good 1km away from Zak.
"What caused the curse to activate?" I pondered, staring intently at the scene in front of me.

Zak Smashed a tree with one sweep of his arm then sensed a chakra source

I flinched taking notice that he sensed me.
"Ahh...gotta be a lot more aware now."

The monsterlike form got on all fours and began sprinting towards him