Beautiful Moment as Crowd Helps Lewis Capaldi Get Through Song Tourette's syndrome is a condition that causes a person to make involuntary sounds and movements called tics. Mental health includes our emotional, psychological, and social well-being. It affects how we think, feel, and act. It also helps determine how we handle stress, relate to others, and make healthy choices. Lewis Capaldi was struggling to sing because of his Tourette's syndrome. The crowd got louder and sang with him. The captions also refer to the fact that Lewis Capaldi had mentioned that he needed a break: Before his final song, he told the crowd: "I recently took three weeks off just because I've been non-stop the past year and I wanted to take a wee break from my head for my mental health. I wanted to come back and do Glastonbury because it's obviously so incredible so I just want to thank you all for coming out."