Well, this is awkward:

Yikes! According to Des Moines Register reporter Timothy Meinch who was covering the event, it was a joke gone wrong and Carson’s point was that growing up, he was the worst student in the class but was later able to become a doctor:

Carson later met with the student for a private pep talk:

It’s nice of Carson to try to make amends, but it could be too little to late: