I think Luigi’s doing better than Mario on this run.

UnitedHealth Group abruptly replaced CEO Andrew Witty on Tuesday, as the sweeping problems facing the company and industry deepened.

Witty resigned “for personal reasons,” UnitedHealth said. He was replaced, effective immediately, by the company’s former CEO and current chairman, Stephen J. Hemsley. A UnitedHealth spokesperson declined to comment further.

Shares in UnitedHealth plunged more than 16% by late morning Tuesday

Also, love the use of sarcastic quote marks.