This is the second time that reactivating Kai improperly has caused him to try to kill those around him. The first time was when Stanley misused Kai's cryo chamber controls and Kai almost killed Stan in the episode "Terminal."
Stan: He's in indestructible killing machine you little turd.
Stan (While putting new protoblood into Kai): This should get him back to normal. Kai normal.
790: Our only hope is for everyone else to offer themselves up for slaughter while Xev and I flee. Stan first.
Kai: When you wake the dead, form dictates that you join 'em.
Laleen: Save me, I'm so pretty and innocent!
Stan: Not that innocent!
Ennox: Waste them one at a time, in cool ways. Be sick! Do some fast, some slow. Have fun! Go major psycho!
Kai: Be careful how you wake me.