Last week on your Worldwide report there was a question about the difference between a clothesline and a lariat. Well, I've done some research, and here's what I came up with: A clothesline is when Wrestler A runs toward Wrestler B with his arm extended. "Contact" is made, and Wrestler B falls down. A lariat is basically the same thing, only Wrestler A jumps toward his opponent with his arm out, and they both go down. A lariat is also known as a "Flying Clothesline," and a clothesline can also be called a "Running Lariat." Incidentally, in the video game WCW/NWO Revenge, Disco Inferno does a pretty wicked lariat.
I hope that makes it clearer :)