Whoopee cushion

Roman Emperor Elagabalus was said to enjoy practical jokes at his dinner parties and often placed whoopee cushions under the chairs of his more pompous guests.

[1][dubious – discuss] The 10th-century Aghlabid emir of Ifriqiya, Ziyadat Allah III, is said to have enjoyed hiding inflated animal bladders under the cushions of his palace for unsuspecting guests to sit on.

[3] The device is made from two sheets of rubber, adhered at their perimeter, with a small flap opening at one end for air to enter and exit.

Whoopee cushions lack durability and can break easily, lasting longest when they are not inflated or sat on with excessive force.

A flatulent noise can be made by inflating a toy balloon, then releasing the opening and letting it deflate.