Nuance of 思い知らせてくれる? ![enter image description here]( What does the add in this example? I know it's generally used for gratitude, but the nuance seem a little different here. Is it a sarcastic gratitude? I thought there was no sarcasm in Japanese.

> I thought there was no sarcasm in Japanese

lol.

Anyway, this is shortened from , which is strong way of saying "", so in this case that sentence is translated to " _Today is the day I'm going to show you how horrible we are!_ "(I'm not sure if this is proper translation).

Note that is used for any circumstances but is mostly only used in a bad way, such as when you act in a way that is detrimental to someone else(as @Jimmy Yang pointed out in comment.).

Side note: Those only applies when you(or someone) is doing/acting something. When you are giving or receiving a thing, does not mean to be bad. e.g. __ is often used when someone is bringing something to you, there's no bad meaning.