Jiggle is good. You don't want alot of bouncing might hit yourself in the face.
Reminds me of a story that a friend of mine told me years ago. She did not have a bra on and was home alone. She was expecting her bf over and when the door bell rang she ran down the stairs to get it. Now she had very very large breasts probably larger then DD. Well she got too excited ran down the stairs and one of her boobs came up and smacked her in the face. It made her lose her balance and fall down the stairs. She got some nasty bruises on her body and the right side of her face was kind of red for a day or so afterwards.