If you fluff a joke in a TikTok, you've always got the option of deleting the video. Not so much live on stage at the world's biggest performance arts festival. <br /><br />#BBCnews #BBCLondon #BBCnewsbreaking #BBCLondon #BBCbreakingnews #BBC #BBCnewslive #BBClivenews #BBCtransmissionlive
