Cameras capture rare moment of Trump practicing before speech -- and Twitter decides to lip read

President Donald Trump was caught on camera rehearsing his speech in his presidential limo as he headed off to address to a join session of Congress Tuesday night.

And the moment quickly captured the attention of Twitter users, who had a field day imagining what the president was preparing to say in the footage.

See people try to guess (or pretend to guess) what Trump was reading

People tried to closely read the president's lips and posted what they imagined Trump was reading aloud to himself in the clip.

Many imagined the president might be making pop culture references, reciting well-known literature, children's books and popular songs to Trump's moving lips.

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One user took the moment to sympathize with what some would find as a rare, presidential moment for the rest of Americans.