1.call out random numbers when someone is counting.

　　2.don't use punctuation.

　　3.reply to a long chat message with a "k".

　　4.talk in a baby voice

　　5.click a ballpoint pen continuously

　　6.borrow someone's pen and then chew it

　　7.after taking a bath or shower, leave your wet towel on the bed

　　8.switch off the light when someone is in the room

　　9.poke someone,circle others whilst talking on your phone,leave the bathroom door open