After seeing the impressive Charlie Sheen impressions brought to the screen by the likes of Bill Hader on 'SNL' and Jimmy Fallon, impressionist Dana Carvey explained on 'Late Show with David Letterman' (Weeknights, 11:35PM ET on CBS) that he didn't feel he could necessarily bring anything new to the impression.

What he could do, though, was teach people how to do their own Sheen impressions. "You start with Jack Nicholson on one side of the voice spectrum," he said before breaking into Nicholson's classic line, "You can't handle the truth!"

"On the other side ... was just a little bit Johnny Carson," he continued. "You go from Johnny and you head toward Jack and you're like, 'Winning, duh!'" Easy enough, right?

Now you, too, know how to impress -- or frighten -- your friends and colleagues with a Charlie Sheen impression. That is, so long as you can already do Jack Nicholson and Johnny Carson.