Here are some of mine:
All of the Black Talon Rumors.
People claiming that they saw someone get their head blown off by a .45ACP.
People claiming that they saw someone get knocked backwards by a .45ACP.
Someone claim that some mysterious German company recently came out with a handgun that takes a magazine that is basically 2 single column magazines together, except they bullet feeding is reversed and once one stack runs out of ammo, the magazine must be removed, turned around and inserted again.
Someone claimed that he saw a .50BMG rifle knock the shooter 12 meters back.
Someone claimed he aimed a .458 Magnum straight at a quarter and hit it at a mile and a half distance.
Someone claimed that he unloaded a whole 8 rounds of bird shot on a squirrel at 10 meters and the squirrel got away. I actually buy this one. What is amazing about it is that the person telling the story not only told it, but did so in a bragging manner.
People claiming that the .45ACP is the largest and most powerful pistol round in the world (you know that I had some fun with this one.
Someone claimed that he had a .50 cal Desert Eagle with a FACTORY installed built in laser sight. He also gave me dimensions of the gun, which were a little under 2 feet long. I asked him if it had an extended barrel and he said no. It was kinda funny because he was trying to boast his ego to my neighbors at my expense, and it all fell apart for him when I returned a few minutes later with a real Desert Eagle of about half the size of his given dimensions and asked him how big his was again.