Cole was feeling particularly murderous right now, for the last two hours, it would be safe to say that he had been a guinea pig for a bunch of pirates. Whatever it is they were using to shock him, it was a weapon with high enough grade and power to make sure that Cole was brought down to his knees.
After he was first knocked out, Cole had woken up fifteen minutes later. It came as a shock to the pirates as quite a few of them expected that he was already dead. But he was not, and in response to him waking up, they knocked him out again, fast forward to another fifteen minutes and Cole was awake once again. This time they left one of their harpoons in his chest, surprised by it, Cole had not been able to react on time as he got a boot to the face and was promptly shocked to unconsciousness again.