That would teach 'em to underestimate a cripple with a murderous streak. He sees Jack crawling out from under the tree and goes to pounce on him. Normally, he'd play around with his prey more, but this prey is very dangerous. The alien instincts want to simply kill the intruder that's in their territory before anything else can go wrong.

He means to take a chunk out of Jack with the swipe he gives, but the sudden shock of electricity throws the momentum off, and instead ends up smacking Jack hard enough to send him flying through the air. Ivar's various injuries are starting to catch up to him now even with all the adrenaline coursing through his system. He stops for a moment as his muscles continue to constrict from now being shocked twice.