This combo is the third assignment in our slackline contest. In this video dutch slackliner Tijmen van Dieren explains how to do it.
This combo is the perfect one to get a feeling of what it's like to do trickbouncing on a highline. Later on you can try to get bigger amplitude, for now, you can do it with smaller bounces and make it yourself a bit easier. 

Information about how to participate can be found here.