In video taken by fans and bystanders, McCarthy is seen zooming down New York City's 58th street on a motorized podium.
As she beings to lose patience with traffic, the comedian then starts to yell "Come on. Come on!" as she waves at drivers to move out of her way.
The sketch will presumably air during McCarthy's upcoming appearance on SNL this weekend when she hosts the comedy series for her fifth time. The appearance brings her into the Five-Timers Club which includes the likes of Tom Hanks, Justin Timberlake, Drew Barrymore, Chevy Chase, John Goodman and more.
On Instagram, McCarthy shared a gif of herself as Spicer running towards the camera angrily. "Straight out da bushes," she captioned the clip, which references a recent incident in which Spicer was reportedly hiding from reporters after President Trump had fired former FBI director James Comey on Monday.
The 46-year-old teased that she would be reviving her Spicer impersonation in a recent promo for SNL that features the actress singing West Side Story song "I Feel Pretty" before undergoing makeup to become the political figure.