The scienfic discussion of this meeting with (from right to left) Des Higham, Myriam, and Ernst Hairer (level: 1863 meters) was about the problem how four people are best placed on one bycicle for driving down a steep slope of 1000 meters.

And here we admire, how the above picture was produced: with an ingeniuos construction of 326 well selected stones and one Leica camera ... in perfect harmony with the gradient of gravitation.