Acrobat

DEF: A person who performs difficult acts requiring high flexibility and balance skills.

EX: This circus has many talented acrobats.

Canada has an acrobatic air squadron that performs difficult and spectacular flying demonstrations that put airplanes and pilots to their extreme limits.

Merriam-Webster Online Dictionary
acrobat (noun)
1.
one that performs gymnastic feats requiring skillful control of the body
2.
a) one skillful at exercises of intellectual or artistic dexterity
b) one adept at swiftly changing or adapting a position or viewpoint - a political acrobat