I worked with a man, ( call him "Tim") I actually quite liked, but it was so obvious that everything he said was a lie.
He insisted he'd been high up in the navy for years, but when I looked him up on linkedin he was listed as unemployed for the all the time he was supposed to have been in the navy.
A female colleague was in the local paper for sucessfully giving CPR to a member of the public who'd collapsed outside our office , ( the guy survived due to the first aid our colleague had provided). Tim went round telling everyone that he couldn't make a big deal about an "adult" giving CPR, as he'd given sucessful CPR several times to several different adults age. 8 as a child.
Tim also purported to be a "secret health and safety inspector " who had the authority to "shut our office down," if he wanted to, ( he never did).
And when Harry Potter came up in conversation, Tim was quick to say he had been a "star extra" in one of the films.
He "couldn't remember " the name of the Harry Potter film he'd starred in.