Glenn McCoy is famous for his clever, irreverent and always hilarious cartoons. Don't give friends or family members a boring Christmas card. Spread a little holiday cheer with these laugh-out-loud holiday cards. We all know Santa's reindeer are a bit magical, but they're not miracle workers. After Santa loads up on billions of cookies and hundreds of gallons of milk, pulling his jolliness gets a lot harder. Unfortunately, there's no weight stations in the stratosphere.