Nico Hulkenberg left red-faced after Gabriel Bortoleto prank at United States GP

Young Audi driver Gabriel Bortoleto played a prank on his team-mate Nico Hulkenberg as the pair walked out in front of thousands of fans at the Circuit of the Americas. With both drivers walking out to cheers from the Austin crowds, the Brazilian pulled down his team-mate's trousers.

Videos of this moment have gone incredibly viral, showing Hulkenberg making his way onto the stage on Friday when Bortoleto grabbed his trousers from behind and pulled them down, to loud cheers and laughter from the crowd. The German took the joke in good humour, laughing as he pulled his clothes straight.