You'll find out quickly that off-the-cuff humor isn't tolerated on HN. Humor only very occasionally survives the downvote democracy, and usually when it's an extraordinarily nerdy joke by someone recognized. This may seem hurtful or annoying at first, but it keeps the signal to noise ratio very high here.
Or combine your one-liner with follow up insight. That way it's not just your joke that is being judged but also your (hopefully) sound argument as well.
