A video of a baby laughing at his dad’s rejection letter for a professorship was tweeted by actress Alyssa Milano last Friday–and quickly went viral. It’s no surprise because Baby Micah’s laugh is wonderfully entertaining. Watch below.

Over a month ago, Marcus McArthur received yet another rejection letter for a professorship. The 33-year-old St. Louis dad is finishing his doctorate and ready to land a job.

As McArhtur does with all rejection letters, he ripped this one in half. His 10-month-old son, Micah, was sitting nearby on the couch in a pink sleeper suit and started to laugh. McArthur ripped the paper again and Micah’s laughter turned to uncontrollable hysterics.

And then McArthur grabbed some credit card statements and his video camera and filmed Micah’s intensely happy giggles–that would certainly send this baby to the ceiling if he were with Mary Poppins’s friend Uncle Albert.

Actress Alyssa Milano got a hold of the video, sent out a tweet, and the rest is history. McArthur, his wife, Amanda, and baby Micah are now making the rounds on the news channels.

McArthur told KDSK-TV, St. Louis, “Around the 22-second mark he does an extremely hearty laugh where you wonder if he’s stopped breathing.

“But he starts laughing again and you think, Yeah, he’s OK. At that moment I thought, Yeah, this is a really great clip.”

This video certainly isn’t news, but the fact that it went viral might be an indicator that we’re all in need of a little more laughter in our lives.

The video has now been viewed nearly a million times.

Do you have funny video footage of your child? Send a link to sfgatemoms@gmail.com and we’ll consider posting it on SFGate.