One of the training mantras is:
Expert Riders use their Expert
Judgement to avoid having to use their Expert Skills...
I'm going to be incredibly blunt here so don't take offense.
You came upon a bridge with another vehicle STOPPED at the other side. You slowed. The vehicle displayed flashing blue and red lights. You continued. The officer in the vehicle pulled forward to block your path. You changed path to go around him. He yelled at you to "STOP NOW" and you panicked and crashed.
Had you been trained you would have learned:
SIPDE:
Scan,
Identify,
Predict,
Decide,
Execute
OR
SEE:
Search,
Evaluate,
Execute
OR
SPA:
Search,
Predict,
Act
All these mental strategies are designed so you live a little farther in the future and are ready with a reasoned reaction to dangers that present themselves. This is where the "Figure it out with a Figure 8" strategy has failed you. You have no mental practice going on. Let's apply the MSF "SEE" strategy to your situation.
Searching for dangers and problems you identify a truck, parked at the other end of a bridge.
Evaluating you realize it's not moving. Is there enough room for him to cross while you cross? Or is he waiting for you to cross. He appears not to be parked. BUT you don't know why? The situation doesn't make sense...best to slow, perhaps even to a walking pace...at the very least move to the far right and as far away from the truck as possible--increasing distance maintains your space cushion and you have more time to react. Best also to make eye contact with the driver! Does he see you? He's staring right at you! Why? Is he in trouble? Does he expect me to stop? COULD HE BE AN UNDERCOVER CONSERVATION OFFICER WITH AT A RANDOM GAME STOP--checking licenses and tags? Best to slow. Move right--NOT TOO FAR because there's suspect traction at the edges and...
Executing, you move right and slow.
Still evaluating the situation you realize he just flashed his blue and red lights. BEST STOP. NOW. Which is easy because you're still on a good surface and should be able to stop from 10 mph in less than 8ft.
Executing you stop in place on the bridge where you have good traction.
Officer Bob steps out, waves you forward and chews on your ass. No blood, no foul.
OH and remember this?
By far the safest and most productive way I've found to spend time on the bike is slow speed practice..
AND
And I LIKE the parking lot work, I like the way it feels, I like the balance skills it produces. It's also fun because it's safe. There can't be very many life changing injuries from PLP.
You almost had a life changing injury from PLP. Because your PLP is random riding, not practice for the real world and other riders. I would suggest if the bike gets back into service: swerving and braking practice. Odds are you locked the front and washed it out. Practicing braking (while remembering if the front skids RELEASE AND REAPPLY the brakes) could have helped you in this situation. As would have a better strategy for dealing with other users.
Glad you're healthy not permanently scarred. Even a fall at 10mph can screw you up--becareful when you're in the parking lot.
***I would suggest that if this is on your property or adjacent to yours it sure sounds like this CO was looking SPECIFICALLY for YOU. (You hint that rather than stop you he could have phoned you--which leads me to believe he, again, was looking for YOU.) You might want to ask yourself WHY is a guy with a gun and a badge looking for me AND is that the way you want to run your life?