I have no idea what Jcool is, sounds like a cross between a soft drink and a refrigerator. Surprisingly, its none of those.
Or, actually, it might be, I have no idea still. Here's why I don't care - new video from Jack N! Probably one of the most impressive fingerboarders out there, finally making a video that isn't just one angle and similar tricks to what he's done before. Of course this keeps with his crazy flip in and out style here, but different angles, obstacles, and some amazing hammers I don't think I've ever seen before?
Go check Jack's channel here :)