Hand to hand acrobatics is a type of performance in which an acrobatic base and flyer balance on top of each other in either a gymnastic or acrobatic medium. It combines strength, agility, flexibility, and balance. For it to be considered hand to hand acrobatics, the top performer (flyer) must be making physical contact only with the base's hands, with the flyer’s hands keeping them balanced. Positions the top can perform in this style of acrobatics are straddles, handstands, pikes, press to handstand, one arm handstands, planches, flags, and many others. Hand to hand acrobatics can also include dynamic catches and throws that either begin with a throw from a hand to hand position or end in a catch in the hand to hand position.