Overreacting to a joke is not okay.
Gerry is talking to his boss in the breakroom, and his boss makes a mildly funny joke.
Gerry wants to kiss up to his boss.
Gerry giggles slightly and tells his boss that it was a pretty good joke.
Gerry doubles himself over with over-the-top fake laughter and acts like it's the funniest thing he's ever heard.
Gerry's boss is satisfied and treats Gerry well in the workplace.
Gerry's boss thinks Gerry is being sarcastic and generates a dislike toward him.