Preventing Lines When Painting Walls

"Hi, this is Dan now we are going to demonstrate how to smooth out your walls once you have put your first coat of paint on it. This wall is still wet and all we are going to do is we are going to come back over this. We are going to start on top come all the way down. I'm not applying any pressure to the roller I'm just let it coat along the wall. What this is going to do is when this dries you are not going to see any striping or any lines it is going to give you a full smooth consistent covering that everybody wants. Not everybody can get unfortunately. Continue straight up and down. Now if you move this you are going to notice that you start getting lines in your paint. So what I'm going to do is give you a demonstration on the lines and how to get them out."