The circus's main attraction was the trapeze act, but the sideshow with the fire-eater was also quite popular.

sideshow 是由 side（旁边）和 show（表演）组成的复合词，字面意思是"旁边的表演"。在马戏团语境中，指在主秀之外同时进行的次要表演项目，通常是一些特色小节目或特技表演。