In video of the April 18 encounter, Frank Tyson can be seen lying motionless on the floor of a bar for more than 5 minutes before police check him for a pulse.
Good advice for a choking person. Performing the abdominal thrust on someone who could talk has the potential to get the obstruction stuck further and completely blocking their airway.
Not good advice for someone possibly panicking that you are actively smothering.
It's almost like the militarized police force is tortured in a controlled setting as part of their training, so they torture citizens... who aren't trained for torture and are not in a controlled setting.