Abstract: Black holes have large classical entropy, with the nature of the underlying microstates remaining a longstanding subject of interest. Among other expected properties, these microstates are expected to be chaotic. Recently, it has been conjectured that they are also`fortuitous’: they change erratically as one tunes the parameters of the theory. 

In this talk (based on work in progress with Micha Berkooz, Trivko Kukolj and Ohad Mamroud), we discuss fortuity for black holes in flat space. We first re-introduce a model for supersymmetric black hole microstates derived from string theory and show that the BH microstates are fortuitous. Using a toy model, we then discuss BPS chaos.