It went as follows:
Crossfit calls this Alternating Double Tabata.
8 rounds of:
-Kettle Ball swings for 20 seconds
-rest 10 secs
-Pull Ups for 20 secs
-rest 10 secs

We didn't have kettle balls so Tim found some boulders instead. And we went to a local playground for the pullups. (see pics) Not sure what's going on there with the red shorts!

Great workout even though it was only a total of 8 minutes. Very deceiving!