circus - n. a traveling show, often performed in a tent with animals, clowns, ...

acrobat - n. someone who performs difficult and dangerous acts (usually at a circus)

spin - v. to turn or cause someone or something to turn around repeatedly

unicycle - n. similar to a bicycle but has only one wheel

negative - adj. thinking about the bad qualities of someone or something

essential - adj. extremely important and necessary

roll - n. an act of turning over and over

expose - v. to experience or to be influenced by something