Elon Musk probably wasn’t expecting this… Watch what happened when Tesla unveiled its “bulletproof” Cybertruck:… https://t.co/WlDIOM3seK
The output is 2 because the tweet expresses a positive emotion about Tesla's Cybertruck. Since the tweet mentions Elon Musk and his expectation of the unveiling, the tweet has an overall excited and positive tone and is suggesting something generally good happened.