In my former life, I used to teach my high school students the art of improvisation. I would share with them tons of improv theatre games so they would be able to think quick on their feet on stage. Improv skills are a necessary part of theatre creativity. You have to totally immerse yourself in the character and the moment.
I'm not going to lie, they would have paid me money to let them reenact the 'O' scene from When Harry Met Sally. But, I thought it best to leave THAT to the professionals. LOL