"Reasonable" is too subjective to be left into the hands and mind of a person with all his/her wants. needs desires and prejudices... Let's leave it at that.
I agree. I hate the word reasonable, but it is thrown around in legal circles all the time. Even when I did some basic law studies in secondary school, that word must have been thrown around 1000 times. Here is a whole afternoon of reading - the actual legislation relating to certain police powers here in NSW where I live:
http://www.austlii.edu.au/au/legis/nsw/consol_act/leara2002451/
Just to present a recent experience I had, showing how hard it is to be in law enforcement these days:
In our suburb we've been having an ongoing problem with illegal trail bikes being ridden in residential streets. Where I am, the problem is a serious one because they fly over a blind crest 25 metres away at high speed in a narrow 50 km/h speed limited street. If I am backing out of my driveway and they happen to be coming, I would never see them. First thing I would know is they are on the ground, dead after hitting my car (they also do not wear helmets, nor do they have lights at night time).
I was visited by a senior Sergeant at my local patrol and he came into my house and we sat down for a good hour to discuss it. You wouldn't believe how crippled these guys are in executing there duties. It is ridiculous. Even if I know the house they live in, it does not help. Not even if they find a trail bike 5 minutes later in that garage with a hot engine and hot brakes. The police cannot "hide" around the cul de sac in wait because that would then require blocking off the road once the biker sees them - something they also cannot do except under very strict circumstances. Actual pursuits are now under extremely stringent laws thanks to too many people being injured or killed - including the ones being chased. A new law called "Skye's Law" was even introduced a few years ago that enabled the book to be thrown at people evading pursuit, but it is one thing to identify a car and another the driver.
A couple of weeks back, our local police staged a "string" operation. It involved amongst other things, an entire regional trail bike squad, highway patrol cars and two police helicopters. I looked up the cost of "renting" them (yes, the police have a policy of renting themselves out for community liaison purposes apart from performing their normal duties) and this operation would have cost them about $12,000 in manpower, cars and helicopters. The maximum fine any of these riders could have got was several thousand dollars. I believe they nabbed three of them. But not all of them.
I just think this whole business of police powers has gotten ridiculous. A police officer here in Australia can't even deploy his or her taser without making the front page news in the national papers, let alone discharge their 22 calibre Glock. They might as well wear tutus, water pistols, carry fairy floss and give out MacDonalds vouchers to law abiding citizens. A police officer has to process so many things when they decide to take action during a time-critical incident that I am honestly amazed they can even do their jobs at all. It's really easy to look back at any given incident and with half an hour's thought determine all the mistakes and work out what could have been done better, but law enforcement have to make snap decisions all the time.
There was another recent incident in Queensland I believe where two female officers made the headlines because they stopped someone in a car who had a bikie-gang tattoo. Obviously another completely innocent, law abiding citizen being denied their imagined birthright (end sarcasm).
http://www.abc.net.au/news/2015-10-27/qld-police-defend-officer-who-pulled-taser-on-tourist/6888864
So I wonder why it is that I have reached 50 years of age and neither myself, nor anyone I have personally known, has even had even so much as the slightest run-in with law enforcement? You'd think that if all these people worldwide making police behaving badly videos are anything to go by, I should have at the very least been bashed, tasered, locked up, hosed down and shot by law enforcement by now. Then again, when I am out and about I just follow the law and comply with anything they have asked me to do. Without exception, not once have I ever seen any of these videos where the so-called victim did not play a role in the incident escalating to an out of control situation.
So far as the original video posted in this thread is concerned, I imagine in future years the driver will play their own indirect role in increasing crime and unsolved crime rates by becoming a civil liberties advocate.