Why does Jim Cramer of Mad Money have so much influence on after hours trading? When he mentions a stock.?

He's self-made that maybe part of the lure to listening to him.|||Here's a little something I've learned about Cramer. When he pushes a stock, the next day in the first 1/2 hr, the stock goes up. To make money off of his hype, get ready to short it.|||mainly because a ton of people watch him... whether or not he has good ideas or is right or wrong, the fact that everyone knows everyone else is listening to what he says makes people think they can make a profitable trade by reacting before everyone else to what he says