Step Back, I Know First-Aid

When a car skidded on wet pavement and struck a telephone pole, several bystanders ran over to help the driver. A woman was the first to reach the victim, but a man rushed in and pushed her aside.
"Step aside, lady," he barked. "I've taken a course in first-aid!"
 The woman watched for a few minutes, then tapped him on the shoulder.
"Pardon me," she said. "But when you get to the part about calling a doctor, I'm right here."