Britain's Got Talent viewers tuned in on Saturday night to watch the second of five semi finals where eight acts battled it out to win the judges' and the public vote.
One of these was London magician Damien O'Brien who wowed judges Amanda Holden, David Walliams, Ashley Banjo and Alesha Dixon with his mind games.
His act bore similarities to his audition as he asked each judge for a different word and later had it already prepared on the screen of his mobile phone.
But when he put his plastic phone in a box and swapped it out for a real iPhone, fans were convinced it had been in the lid of the box, while others guessed someone had changed the phone's background remotely, or that the judges were in on it.
Read more on mirror.co.uk