Sean Penn appeared on The Late Show with Stephen Colbert Monday night to promote his new book “Bob Honey Who Just Do Stuff.” During his appearance, he chain smoked and claimed to be on Ambien. Viewers took to Twitter to chime in, with one user saying, “Looking at Sean Penn on Stephen Colbert got me thinking I will never take Ambien.” Another user said, “At what point did Sean Penn turn into Popeye the Sailor Man?”
