Believe it or not its silly things like that pec jiggling that create stars. For example:
"You smell what the Rock is cooking?" The Rock
"And thats the bottom line cause stone cold said so!" Stone Cold Steve Austin
"Have a nice day!" Mankind
"Whoooooaa!!!!!!!" Flair
"Watcha ya gonna do when Hulkamania runs wild on you?!" Hogan
If Vince see's something and the fans approve of it and cheer it, you'll go from making 300,000 dollars a yr lower - midcarding and making 750,000 - up per year and main eventing. Its the suttle things that a wrestler does that the fans love that will make that wrestler an instant star.