Payback

"What's that? What are you doing to him?"

"It's just a stethoscope, Mr Angel." The doctor looks puzzled; surely everyone knows what a stethoscope is. "I'm checking his heartbeat."

Connor whimpers as the cold metal touches his chest, and Angel steps closer. "You're hurting him."

"Please, Mr Angel, I know what I'm doing." He lifts the stethoscope. "Connor is perfectly healthy. I'll just test his reflexes..." He puts his finger in Connor's tiny hand, then gasps in pain as the baby clutches it with superhuman strength. When he gets loose, there's blood pooling under his fingernail. "Healthy and... uh... strong."