Bullshitters are endless and come in many types: I believe you can find one or more guys who claim extraordinary prowess in the unarmed martial arts in any bar you care to walk into.
Another subgroup are the military bullshitters: I have probably personally met more "Navy SEALS" than have ever actually served on the teams throughout their history. Guys who claim some sort of spec ops background are a dime a dozen. I suspect a large percentage have never even worn the uniform.
I can never understand how some people's minds work. I can recall interviewing a guy for an editorial job with Guns & Ammo many years ago. He told me he had a military-stock Mauser that was so accurate that he could hit the head of the 400-yard iron deer at Angeles Shooting Ranges consistently with it, even with the primitive sights stock on these rifles. "How can you tell you're hitting it in the head?" I asked. (I had pranged the same deer myself many times.) "Oh, they let me go downrange and examine it," he replied. "I see," I said, "And you assume the fresh pock marks in the head were made by your rifle?" "That's right," he said. Well, I was shooting at Angeles just about every week in those days, and there is no way on earth that they would extend a cease fire to let some clown make a half-mile round trip to look at the deer! Right there he burned his chances. And it was so stupid of him. If he had said, "I have a military Mauser that's so accurate that even with the iron sights I can consistently keep my groups under 2 inches at 100 yards," I'd have probably believed him.
My alltime favorite bullshitter incident occurred when I was in the airport about 16 months ago and we were in line doffing our shoes. I complimented a well-dressed older gentleman standing in front of me on his shoes. "Yeah, these are Allen-Edmonds. They cost about $700 or $800 a pair," was his reply. (These were just standard-looking A-Es, not the Seven line or anything.) All I said was, "Really? I hadn't realized they'd gotten so expensive."