Veteran Canadian comic David Tsonos hates one thing: the drunk heckler. Once the sun goes down in Edinburgh they come out and since he can't beat them, he is inviting them. The audience are issued paddles and raising them when they wish to heckle which makes a controlled-chaos atmosphere. Watch David compere with three different international guests each night as they take on the hecklers. Some comics say it is their favourite show to perform on.