Just for roostery individuals who feel like they can do this and want to use it for "fun", I say to you that it requires confidence and purpose.
Wanting something as a joke, or using Social Engineering as a means to remedy boredom, is not useful, nor is it possible with most personality types.
I cannot do this in real world situations in it requires me to physically talk to anyone. I seriously doubt that many people here, with the personalities that they have, can pull this off. The best that you can do is to use this skill set to give ideas to people above you to help you do well. -->
An example would be something simple, such as knowing something fun about a teacher, such as a love for a certain movie, and drawing a character from that movie on a test doing something in your favor.
...I had Indiana Jones whipping a problem about velocity explaining that I didn't know how I got my answer, but I "Just knew it." Ordinarily, answers must be explained in full, and the way I got the answer was from the dude next to me, but she took it as a fun joke. No need for verbalizing anything.
You can learn about this in certain Psychology classes in college if anyone is truly interested.