Knowledge that has been lost
Answer: My own accidental cut across the knuckles was a flea-bite. Doctor Livesey patched it up with plaster and pulled my ears for me into the bargain.
Hope this helps! :D
Everyone shows up to the party, even people who were not invited. Most of the people don't even know who Gatsby is and how he looks like.
After the parties, people leave recklessly. There is a scene of a guy, called Owl Eyes, who crashes his car just a few seconds after he starts driving away. Furthermore, because he's drunk, he continues to drive it even after one of the wheels has come off.