  When analyzing the perception of Hawking radiation by different observers,
the Hawking effect becomes mixed with the Unruh effect. The separation of both
effects is not always clear in the literature. Here we propose an
inconsistency-free interpretation of what constitutes a Hawking effect and what
an Unruh effect. An appropriate interpretation is important in order to
elucidate what sort of effects a detector might experience depending on its
trajectory and the state of the quantum field. Under simplifying assumptions we
introduce an analytic formula that separates these two effects. Armed with the
previous interpretation we argue that for a free-falling detector to cross the
horizon without experiencing high-energy effects, it is necessary that the
horizon crossing is not attempted at low velocities.
