It works like a charm on the next baby, too. “You can see that he comforts pretty quickly,” Hamilton says. He holds the infant at a 45-degree angle and explains, “I shake his little booty like that, I gently rock him — everything you do is very gentle, you don’t want to do jerky motions ever. You hold the child with the fleshy part of your hand, not your fingertips. And I am supporting his chin.”

He sums up the advice in 4 steps:

1. Fold the baby’s arms across the chest

2. Secure arms gently

3. Grasp diaper area

4. Rock at 45-degree angle

Hamilton says it’s important to hold the child at an angle, not straight up and down, to maintain control. (