I know questions like this have been discussed a million times but I feel my situation is different. I was playing earlier and thought I would use height to my advantage. I stood right near the service line and stood on my tip toes. Even with the racket below my waist I was still able to hit the shuttle very flat over the net. I am wondering if the shuttle needs to go up before going down or if you can't stand on your toes while serving. Thanks in advance.