Slow walkers. Especially if they are right in front of me. And especially if they’re at the top of the subway blocking the way for everyone. 

Loud chewers, bright overhead lights and whistlers turn me into a maniac. 

People who leave the subway and stop just outside the stairwell, blocking the way for everyone else. Also people who type really loud on their computer when I’m trying to concentrate.

Bright overhead lights are number one for me

People who, when boarding the plane, stop in the middle of the aisle to take their jackets off and stuff them in the overhead container. 

1. By choosing to take their jackets off on the plane vs. before, they slow down the entire line, increasing the risk of delay. 

2. Instead of sitting with their jacket, they take up extra space in the overhead, making it harder for people to find space for their stuff. 

yes, as the title suggested. but i want to know if there's a specific/scientific reason that certain behaviors/noises/whatever just chews your brains out 

what is your pet peeve?