Determine the emotional tone of the following tweet: "@Rocks_n_Ropes Can't believe how rude your cashier was today when I was returning an item!  Your customer service is slacking. #terrible". Use the provided emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. Respond with the emotions you identify or "neutral or no emotion".
anger, disgust