After Stockholm I went straight home to celebrate my grandpa’s 95. birthday and to spend Christmas with my family. The wee before Christmas I spent in Zurich where I met with Jürg Fröhlich and Tom Ilmanen to learn more about Jürg Fröhlich’s Events, Trees Histories (ETH) approach to quantum mechanics. In a lecture at UZH Jürg Fröhlich presented a model based on the ETH approach that interpolates between stochastic and unitary evolution based on the coupling strength between the system and electro-magnetic fields. This leaves unitary evolution as a short time approximation for quantum mechanical systems that are weakly coupled to electro-magnetic fields. There exist some vague ideas how to test this.