Flashes the laser every second by his watch. Sees a blue beam leave the laser. Flashes are shifted to radio wavelengths. Getting fainter with each flash. Universe vanishes as he crosses the horizon Gets shredded by strong tides near the singularity and crushed to infinite density.
Time flows as it always does as seen by the infalling astronaut.
Light emerging from near the Black Hole is Gravitationally Redshifted . Take a Virtual Trip to a Black Hole or Neutron Star . Seeing what can't be seen. Look for the effects of their gravity on their surroundings. A star orbiting around an invisible massive companion.