-Those people that compare themselves to others and see somebody lifting heavier than they are, and get a little jealous. You are there for your own improvement at your own pace, don't compare yourself to others.
- People who are dumber than a fish, thinking they are the shit and pumped up, while they only have decent biceps or something. So sad.
- Asshats who are like predators (read: bloodhounds) to get to use a machine you are using.
-People who occupy 2 machines at once, even though they are using one only atm.
-People like a friend of me who recently started lifting seriously and follows a plan given to him by an instructor, I have been lifting for 3 years. He instantly thinks he knows it all and that he knows it better than me (claiming instructors are flawless and know it all).....I can get pretty angry at this. He gained a little muscle and thinks he knows it all. Oh well...