Watch hilarious prank reactions that will make you laugh out loud! Enjoy the funny surprises and the priceless expressions of the people getting pranked. Syria reveals the UK is no longer a player ...

Mr Trump admitted that he "didn't expect" that reaction - but ... of the many reasons people laugh - and most of them are not because somebody is being particularly funny. Laughter is primarily ...

For example, pretending to laugh when you seriously don’t find things funny will expose you as a ... that of displaying an honest but unpopular reaction. Likewise, genuinely laughing at jokes ...