The discussion centers on whether the reflection of a massive quantum particle from a mirrored surface can be classified as a Lorentz Boost, particularly in non-collinear scenarios. Participants express confusion over the relevance of a mirrored surface, noting that the term "Lorentz Boost" typically refers to a mathematical transformation rather than a physical phenomenon. There is uncertainty regarding the application of these concepts to massive particles, as the original question lacks clarity. The conversation highlights the need for a more precise definition of terms used in the context of quantum mechanics. Overall, the topic remains unresolved with no definitive conclusions drawn.