Emotion after beautiful kills (Overwatch)

On YouTube, I watch the channel over the over, there often, after a beautiful keel (like An's example), they give a military salute, or wave their hand (like May's example). What is this emotion? How to find it?
And this emotion is silent, that is, it is not a "hello" emotion.
The second question, after some skating rink, immediately after the end of the battle, some players throw off beautiful phrases in the chat when they leave, how do they do it?