The mom stood up to leave with the crying infant, but instead Engelberg took the baby in his arms, calmed it down, and “continued the class as if nothing had happened,” Fishbaine wrote on a viral Facebook post of the photo.

“My dad just loves kids and loves babies, he has five grandchildren, so he just takes the baby,” Fishbaine told BuzzFeed News. “He’s the one that’s in motion, he’s walking around the class. So he just takes the baby and continues teaching.”

She added that it’s “not something unusual” for her 67-year-old social psychologist dad, since so many of his female students bring babies to class, and sometimes even breastfeed.

“This is what I call an excellent organizational behavior lesson! Dad, you’re the best!” Fishbaine wrote.