This paper draws on feminist new materialist, poststructuralist and post-human theories to rethink discomforting moments when engaging with sensitive topics in teacher education. It is argued that the common approach to such events--as instances of student resistance or pedagogical failures--is both simplistic and problematic, and that a more holistic and in-depth approach is needed. Inspired by Deleuze and Guattari's ideas of assemblage and affect, our aim here is to re-theorise an instance of such an event in an attempt to make visible how place, space, objects, emotion, affect and history entangle in predictable and unpredictable ways in teacher education. The aims of the paper are to propose new ways of engaging with discomfort in teacher education and, secondly, to introduce post-human approaches in the field of teacher education, where they are underrepresented.