I have. It's a kids toy with a slow mo video. But I am sure the founders of this seeded this thread with enough fake accounts to make sure it gets its much deserved publicity.
You realize that all new accounts on HN show up with green usernames. Currently, there are only two 'new' users who have posted in this thread, both expressing negative views about the product. If they've 'seeded' this thread with fake accounts, there's no evidence of it.