Last night, this new mom and dad came out for a meal at the restaurant i work at with newborn baby. Lovely couple and sweet baby, must have been at the most 3 weeks old. Especially the dad, while the mum was eating her meal, was holding their baby and kept bouncing him on his knee very fast and was jolting the baby. I suppose that was his way to pacify the baby, but i did not think bouncing/shaking up and down fast would be any good for such a small infant. Your thoughts.