Salman Khan has been kept amused on the set of 'Prem Ratan Dhan Payo'. The star is shooting with Neil Nitin Mukesh and Armaan Kohli (who play his brothers) at the ND Studios in Karjat.

Armaan, who has got himself an Airwheel, a self-balancing electric unicycle, was spotted moving around the set on his new acquisition recently.

Every time Sallu catches Armaan zipping across, he can't stop himself from cackling. Looking at Sallu's fascination for this, Neil gave him an instant demo.

When onlookers started taking snapshots of the trio being so involved with the unicycle, one of the unit hands made them delete pictures! Funny how Sallu wants certain things kept secret.