See more from Britains Got Talent at Dont try Billy and Emilys death-defying roller-skating act at home folks! The roller-skating siblings raise .\rbr\rbrDont try Billy and Emilys death-defying roller-skating act at home folks! The roller-skating siblings raise the stakes for the semi-finals, with Emily flying on stage .\rbr\rbrSee more from Britains Got Talent at The Judges cant believe what they are seeing as Billy and Emily put a “fresh spin on roller-skating”.