President Donald Trump joined Vice President Pence, Gen. James Mattis among other leaders at the Tomb of the Unknown Soldier on Memorial Day, where he paid a solemn tribute to the lost soldiers and participated in a wreath-laying ceremony.
And during the festivities, the president sang along to the "Star-Spangled Banner" during the opening of the ceremony -- a portion of the event which has since been picked apart by Twitter upon its debut.
Trump's voice could not be heard over the orchestra, but that has not stopped tweeters who were less than amused with the president's demeanor during the somber event.
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"Trump theatrically singing the national anthem like a 1st grader while Mattis looks like he's about to cry ... in rage and disgust," one person tweeted while another wrote, "He was dancing and singing to himself. It was a show about Trump. He looked like an idiot."
Several users speculated that the president, who stopped singing at several points oft the song, forgot part of the lyrics.
Others thought Trump appeared "jovial" swaying and singing during the ceremony in contrast to Mattis, who stood' straight-faced next to him.
However, many users defended the president and saw nothing wrong with the president singing along to the country's national anthem.
See some of the social reactions to the buzzed-about moment:
Social reactions to Trump singing the National Anthem
Uhm, was trump bobbing his head while singing part of the Nat"l Anthem at Arlington?
@DavidCornDC Classic trump also at Arlington - basking in the crowd's applause w/a huge grin on his face... singing… https://t.co/qzTFDrMriO
#Outnumbered Trump singing the national anthem during today's Memorial Day ceremony - the late night shows have lots of material tonight.
All you watching this? Trump clowning around while singing national anthem during Memorial Day ceremony at Arlington. #MemorialDay
@frangeladuo @SMShow Anybody catching this Memorial service @ Arlington with Dopey Trump singing and swaying like it's a pep rally? WTF?
#Arlington good Lord, someone gave tRump some happy pills today (singing). Its a somber moment you fool. Will he ever stop embarrassing us?
tRump singing at Arlington ceremony like he was on The Voice. Body language of dignitaries next to him? Priceless. #Arlington
Trump at Arlington, mugging & singing for cameras is sickening. For those who haven't been, it's an incredibly solemn site. Deserves more.
So trump is dancing and singing to the national anthem at Arlington Cemetery.......what do I even say to this?
Trump singing probably just broke Twitter #arlingtonnationalcemetery
Why was TRUMP singing along to the Star Spangled.Banner and didnt know the words, just sit down.
trump not looking somber at all. Bobbing head, all smiles,and singing. This embarrassment is always inappropriate.
#Trump obviously doesn't realize the #ArlingtonCemetary ceremony is solemn as he is singing & tapping out tunes on his lapel.
Trump singing along to the national anthem at Arlington is the highlight of my day.
The Orange Piece of Shit looked like everyone's drunk senile old uncle singing the anthem at Arlington. Trump is national embarrassment 🇺🇸
I absolutely love it during the national anthem you could see Trump singing the words I don't even think Obama knew the words. Trump rocks!
@HannitysHead @realDonaldTrump Wow. Here's Trump singing and dancing through the National anthem on Memorial Day. W… https://t.co/4NNUAusPt5
Ok I hate Trump just as much as the next guy. But why are people mad at him for singing the national anthem? https://t.co/soU7hh6ysr
@dcexaminer Yes, POTUS Trump loves America & also has no problem showing respect by singing along & putting his han… https://t.co/l5MMpIT8sB
At what should be a somber ceremony to pay respect to the dead Trump is singing the national anthem like its happy… https://t.co/n8t18oZxj3