It's completely understandable that you're 'living down' the shock of the incident, James, and rationalising it in various ways, but, as you say, it was a freak occurrence. You can't assume that the same thing would have happened had you positioned yourself behind the cab. She might have stopped, or you might have noticed her car approaching and taken evasive action. However, no-one can know. Had you been in front of the cab, you would have got shunted and most probably injured had the same thing happened, but again there's no point in dwelling on it and no-one could possibly know.
You can never eliminate risk for anyone, and even were you to recommend the techniques you describe (NB never, ever use the term 'best practice'--it's one of the most stupid concepts in existence), it wouldn't be your fault were such a crash to occur to those to whom you had recommended this. Remember that you effectively only help people in their risk assessments, and once they're out there, they make their own risk assessments and don't act on yours. 99,999 times out of 100,000 the information you give them would help them assess risk, and they would most probably also understand that risk is never eliminated completely.
As I said, I completely understand your concern and worry, and it's easy for me to comment along the lines of the above, so it may not be that helpful. It sounds as if you're nearly there, anyway.
It's completely understandable that you're 'living down' the shock of the incident, James, and rationalising it in various ways, but, as you say, it was a freak occurrence. You can't assume that the same thing would have happened had you positioned yourself behind the cab. She might have stopped, or you might have noticed her car approaching and taken evasive action. However, no-one can know. Had you been in front of the cab, you would have got shunted and most probably injured had the same thing happened, but again there's no point in dwelling on it and no-one could possibly know.
You can never eliminate risk for anyone, and even were you to recommend the techniques you describe (NB never, ever use the term 'best practice'--it's one of the most stupid concepts in existence), it wouldn't be your fault were such a crash to occur to those to whom you had recommended this. Remember that you effectively only help people in their risk assessments, and once they're out there, they make their own risk assessments and don't act on yours. 99,999 times out of 100,000 the information you give them would help them assess risk, and they would most probably also understand that risk is never eliminated completely.
As I said, I completely understand your concern and worry, and it's easy for me to comment along the lines of the above, so it may not be that helpful. It sounds as if you're nearly there, anyway.