Who knows why Donald Trump did a double fist pump before a 9/11 memorial.

The president has been criticized for the move before a service remembering the terrorist attack in Pennsylvania, which goes without saying, is a period for solemn reflection.

But anyway, here he was looking pumped.

.@realDonaldTrump First Lady Melania Trump greet supporters as they arrive in Johnstown, PA to attend the Flight 93 September 11 Memorial Service in Shanksville, PA pic.twitter.com/SRMBvlDLKJ — Doug Mills (@dougmillsnyt) September 11, 2018

While we scratched our heads, Twitter user Rob Sheridan created a cut-out of Trump with a transparent background, perfect fodder for people to Photoshop and do their "absolute worst."

It just so happened that I've been doing Photoshop masking all morning for a project, so when I saw this photo I knew what I had to do. Here's a PNG with a transparent background, please do your absolute worst: https://t.co/lCKdwD0PrI pic.twitter.com/lZmsoHtTE9 — Rob Sheridan (@rob_sheridan) September 11, 2018

And Photoshop they did. Trump was placed into a whole bunch of other situations, like Russian President Vladimir Putin riding him like a horse. How apt.

17 YEARS SINCE SEPTEMBER 11TH! pic.twitter.com/OLaoHhwAon — Jon Zal (@OfficialJonZal) September 11, 2018