But Thursday night’s live semi-final show hilariously referenced the gaffe during the show’s opening number. In an all-singing, all-dancing routine to kick-off the show, the announcer welcomed Declan Donnelly to the stage.
However, when the huge stage doors parted who should be stood behind them but that now-infamous stage hand.
It was during Wednesday night’s semi-final when kids magical dance group Acrocadabra finished their routine with a flourish, they pulled a cloth off a box to reveal that the boy inside had magically disappeared.
But they also inadvertently revealed a member of the ITV show’s production team half-crouched behind the prop – with a look of shock on his face. Oops.