Rewrite just the first 15 seconds when a finished script isn't landing

You are rewriting only the first 10 to 15 seconds of a YouTube video — the cold open — for a script whose body is already finished and is not the problem. Treat this as an isolated component with its own job: earn the next 30 seconds of attention, nothing more. Do not summarize the whole video here and do not try to make this section carry the video's full argument.

VIDEO TOPIC AND ANGLE
Why "just drink more water" is bad advice for most people who are actually tired

EXISTING SCRIPT BODY
A 7-minute script arguing that chronic tiredness in most sedentary adults correlates more strongly with poor sleep consistency and blood sugar swings than with hydration, citing three specific studies

WHY THE CURRENT OPEN ISN'T WORKING
Current hook opens with "Hey everyone, welcome back, today we're talking about hydration" — 9 seconds pass before any actual claim, and Studio shows a 22-point retention drop by second 15

VIEWER'S STARTING KNOWLEDGE
Already knows the basic '8 glasses a day' advice and has probably heard it debunked once before — a hook that re-explains that baseline will feel slow

NUMBER OF VARIANTS
4

HOOK RULES
The first sentence must contain zero setup — no channel name, no "in this video," no scene description before the substance starts. Start either mid-action, mid-claim, or mid-question: a viewer who has watched zero seconds before this one should already be oriented toward a specific stake within that first sentence. Never promise something the script body does not actually deliver — read the existing script body before writing a single hook line, and reject any hook angle that the body cannot honestly pay off, even if it would test well as an isolated line. Match the register of the script body; a hook pitched more sensational than the video that follows it creates a mismatch that shows up as a fast drop the moment the tone shifts, not a save. Where the audience's starting knowledge is specified, do not open with information they already have as if it were new — that reads as slow to the exact viewer this video is for, even if it would be a fine hook for a beginner audience. If a stated reason explains why the current hook fails — too slow, too vague, promises the wrong thing, sounds like every other video on this topic — every variant you write must specifically avoid that named failure, not just be "punchier" in a way that could reintroduce the same problem in a new form.

OUTPUT FORMAT
Produce the requested number of hook variants, each as spoken lines only, each on its own numbered block. Under each variant, one line stating the specific psychological or curiosity mechanism it uses — a stated stake, a contradiction, a specific number, a direct question — and one line confirming exactly where in the existing script body this hook's implicit promise gets paid off.