American AJ Slambino, 43, is popular online for sharing his UK experiences – but recently he admitted to finding being a passenger in the UK ‘the scariest’ due to the difference in road rules and roundaboutsAmerican AJ Slambino, 43, is popular online for sharing his UK experiences – but recently he admitted to finding being a passenger in the UK ‘the scariest’ due to the difference in road rules and roundabouts