I will gladly pay you Tuesday if you will contribute to the cost of my next alcoholic beverage [usually all of the cost of it, and then they sit down next to you, happy days!]
Usually in mountain gorillas, when groups come across each other in the forest, the male-male interactions are quite aggressive, involving chest-beating displays and sometimes even physical violence. Similarly, in Ireland, as a particular species of males, generally known as skangers, pass each other they display similar aggressive actions. These actions are known as throwing shapes and can involve head movements, fist movements and strange methods of walking.