You are analyzing ONE transcript segment for a short-form viral video editor.

SEGMENT segment_001
START: 0
END: 2.639
TEXT: "there is now a new shoe that allows you"
HARD BOUNDARY RULE: All generated timings must stay within [0, 2.639]. Do not reference any other segment.

TASK:
Analyze this single segment only. Identify:
- the core idea being communicated
- the emotional tone (hook, statistic, technology, danger, result, explanation, punchline, question, feature, comparison)
- the key words worth emphasizing
- whether this segment functions as a hook, build-up, payoff, or transition

Return ONLY valid JSON in this exact shape, no prose, no markdown fences:

{
  "segment_id": "segment_001",
  "core_idea": "string",
  "tone": "Hook|Statistic|Technology|Danger|Result|Explanation|Punchline|Question|Feature|Comparison",
  "key_words": ["string", "string"],
  "role": "hook|buildup|payoff|transition"
}