A methodological note by A.A. Grib and Yu.V. Pavlov (Usp. Fiz. Nauk 179 279 (2009) [Phys. Usp. 52 257 (2009)]) is commented on to show that its authors are incorrect in understanding a passage which they quote from A.M. Cherepashchuk’s book “Black Holes in the Universe” (Fryazino: Vek-2, 2005, p. 7) and which supposes an astronaut to be at rest in the vicinity of the horizon (not to fall free onto the black hole!). With this error corrected, Grib and Pavlov’s is quite a useful note methodologically.

References (5)