Leaping through the air and hitting your opponent with your full body horizontally. Can be done from the top rope, the apron, or just a running start. The diving crossbody is a staple move that everyone from high-flyers to heavyweights uses. It's simple, it looks good, and when a 250-pound person launches themselves at you sideways, it's going to hurt regardless of scripting.
"Diving crossbody from the top rope! The bigger guy caught him mid-air and turned it into a fallaway slam."