Please analyze the tweet "@TrueRyuga I tore my MLC playing football in HS. Knees are serious business. Take care of them! Lemme know if you need anything." and classify its emotional content. Choose from the following emotions: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If no emotions are detected, respond with "neutral or no emotion".
anticipation, joy, optimism, sadness