Please check out the following sentences.

(1) When it was my turn to appear on the scene, I unexpectedly stumbled on the stage and fell down.
(2) Seeing my awkwardness, the audiences burst out laughing.
(3) At that moment, I was at a loss.
(4) I dare not to put my eyesight on the auditorium, but indistinctly heard a voice “keep going!” from my director.