One evening three months ago, Paul Klein was riding his Vespa through the streets of Los Angeles. As the Lany singer passed through an intersection, a car taking a left smashed into him, hurling Klein across the car’s windshield. When he woke up in an ambulance 20 minutes later, Klein found he had serious injuries. “I pretty much broke my face. I broke my shin bone, tore my calf, and my shoulder was hanging on by one ligament,” he says. “I’m thankful that I’m not missing any fingers or any limbs,...