Call him a baby whisperer or a pediatric YouTube star. A doctor’s simple guide to soothing a crying baby became a YouTube blockbuster in seconds, racking up millions of views in just a few days. Dr. Robert Hamilton, a practitioner at Pacific Ocean Pediatrics in Santa Monica, California, said his patients have asked him “a million times” to share his advice online. When he finally uploaded the video on Sunday, it was the first video he had ever posted, and as of Thursday morning it had nearly 6 million views.

“I’m a little humiliated,” Hamilton told TODAY to Parents. “I never in my wildest dreams thought this would happen.” The technique, which Hamilton calls “holding,” consists of four steps: Raise the child and gently fold his arms over his chest. Secure the baby’s arms with your hand after they are folded. This hand also supports the child’s chin.

Gently hold the baby’s bottom with your dominant hand. Use the fleshy part of your hand, not your fingers, to ensure a secure hold. Position your baby at a 45-degree angle and rock them slightly. The movement can be up and down, or you can try to shake the baby’s butt. The point is to make the sequence smooth and avoid sudden movements. The angle is important because it helps you control the baby.

That’s all. The results in the video are fast and wonderful, as shown in the case of babies who are restless after vaccination. They calm down instantly. Use this technique for babies up to 2 or 3 months old. According to Hamilton, after that they become too heavy to be held in this position.