Making a quick pit stop at celebrity supermarket Gelsons, Charlie Sheen's personal assistant, Rick Calamaro, appears a bit fazed by recent allegations that he's to blame for the Ferris Bueller's Day Off actor's wild cocaine addiction.

Rick says Charlie is "good" and that he doesn't like reading about negative speculation in the press -- when he's been a good friend to the star for years.

Whatever the case -- Charlie: get well, dude!!!