  I recount here my association with Prof. Detlef D\"urr leading to our
memorable research collaboration on arrival-time distributions in quantum
mechanics. He influenced my life, both personally and professionally, as few
others have or ever will. Detlef is my role model for what a brilliant,
discerning scientist, academic, and mentor can and should be.
  The "arrival-time problem" in quantum mechanics is examined selectively, with
an emphasis on the arrival-time distributions of Bohmian particles. In what
follows, the "exotic" Bohmian arrival-time distributions of spin-polarized
electrons accelerating down a cylindrical waveguide [S. Das and D. D\"urr, Sci.
Rep. 9: 2242 (2019)], and some variations thereof are discussed. I shall not go
into the mathematical treatment more than is necessary to spell out the key
results. The intention is to document the circumstances and motivations
underlying the ideas.
