I have given some thought about the 2-person intervention where each person take turns to try to walk silently without being detected by the other towards the middle, which is the goal.

Here, I have further refined the idea to make it a tad more competitive and primal.

The setting is on a hot sunny day, out in the grass fields. In the middle a temporary tentage is placed, and spectators can hide here. There’s also plenty of water bottles at the tentage for thirst quenching.

The mechanics remains the same:

• both participants sit facing away from each other
• one of them starts first, by turning around with chair in hand, and tries to slowly make his/her way towards the tentage
• if the other manages to catch him/her moving by clapping at that right time, the moving person will clap once, then get seated, and the roles are reversed.
• if not, the catcher will shift his/herself a little further from the tentage, while the roles remain.

The interesting dynamic here, in my opinion, is that as it is a hot day, an implicit time limit is ‘enforced’; both participants will try to get to the middle as efficiently as possible. But doing so will also risk them getting caught faster or more often. And the penalty of moving further away also makes the catcher more attentive to his/her surrounding.