Hello! don't roast people so they get A list people open their homes and hearts. Hence they are a safe place for people of celebrity significance to be shown in.

In British English 'trick' can mean many things. You can do a trick on a skateboard but the usage I have is

a clever or particular way of doing something.

"the trick is to put one ski forward and kneel"

I hope that clarifies the British English usage. Elsewhere 'trick' probably means deception but in British English there are other uses, e.g. the trick to explaining something is to cite Wikipedia.

Compare 'knack'? A positive skill but simple at heart. "There is a knack to it."

I understand knack not to mean a learned skill but instead a natural aptitude. For example, a knack for humor, figuring out mechanical things, putting people at ease, debugging code, etc.