CHARLESTON, SC - Here's the bottom line: Don't mess with the Weather Channel's Jim Cantore while he's doing a liveshot.

Cantore was at South Carolina's College of Charleston Tuesday night doing live reports on the unusual snowstorm when a young onlooker figured it would be a great idea to run into the shut and disrupt the always-intense meteorologist.

The result was decisive, lightning quick and.... likely painful.

Cantore quickly spun, jacked his knee up and hit the guy right in the... well, we probably don't need to tell you more.