Donkey Kong Circus

Donkey Kong Circus was a dangerous juggling act with Donkey Kong as its main performer.

History
Near the Construction Site, at a circus, Donkey Kong was balancing himself on top of a barrel while trying to juggle pineapples but avoiding Fireballs shooting out of the flaming oil barrels.

Mario was part of the audience, who laughed whenever Donkey Kong missed a pineapple or got burnt by a Fireball. Mario eventually gained Donkey Kong as a pet.

Timeline

 * Mario is in the circus audience watching Donkey Kong perform, implying this is before Donkey Kong (Arcade) where Mario got Donkey Kong as a pet from the circus.