Former President Barack Obama commemorated recently deceased scientist Stephen Hawking’s death with a photo of himself, repeating a well worn pattern of his presidency.

Have fun out there among the stars. pic.twitter.com/S285MTwGtp — Barack Obama (@BarackObama) March 14, 2018

Obama last repeated this gesture after the death of renowned boxer Muhammad Ali showing himself sitting underneath a photo of Ali.

He shook up the world, and the world’s better for it. Rest in peace, Champ. pic.twitter.com/z1yM3sSLH3 — President Obama (@POTUS44) June 4, 2016

The former president repeated the trend with civil rights icon Rosa Parks, Arnold Palmer, Nelson Mandela, and 9/11.

In a single moment 58 years ago today, Rosa Parks helped change this country. pic.twitter.com/C502SKfJnj — Barack Obama (@BarackObama) December 1, 2013

Here’s to The King who was as extraordinary on the links as he was generous to others. Thanks for the memories, Arnold. pic.twitter.com/UlyfpIBOL2 — President Obama (@POTUS44) September 26, 2016