The Geordie boys have never been too afraid to join in with hopefuls on the ITV talent contest.
They've danced, put their heads in a chopping block and even had knives thrown at them.
However, it seems nothing has left them more baffled than one contestant who invites them on stage during the new series.
The mentalist tested how in sync they are with each other, making Ant act as a voodoo doll for Dec, before they both drew the same picture without looking.
"We didn’t know we were going to be part of this act," explained Dec. "He goes on stage and starts talking about how this act can only be done with two people who have a real bond.
"So because we’ve been working together nearly 30 years, he got us on stage. We had to sit on separate chairs with our eyes closed so we don’t know what happened.
"All I know is that I got prodded and everyone was telling us afterwards that he never touched me, he always touched Ant. Yet I could feel it!"
Ant continued: "We had to both draw something with our eyes closed and we drew the same thing, that was mad.
"We are quite in tune with each other. This guy took it to another level."
"We can’t wait to watch it back because everyone was going on about how freaky it was!" added Dec.
One performer the presenters weren't puzzled over is their Golden Buzzer pick.
Dec told of his relief at claiming the "lovely, sunny personality" - now a guaranteed semi-finalist - before the judges could.
"We fell in love with him before he’d even gone on stage. He’s a real character," commented Ant.
"We were really moved by him," recalled Dec. "When he was chatting to the judges we were worried one of them was going to nab him.
"So when they didn’t we were like, 'We’ve got to sprint for this!', and we got him! I can’t wait to see him again."
More details about the illusionist and the Golden Buzzer recipients will emerge in the coming weeks.
Britain's Got Talent returns to ITV this Saturday at 7.15pm with its first auditions episode.
Stephen Mulhern follows with spin-off show Britain's Got More Talent on ITV2 at 8.35pm.