"Still debating whether this one is closecalldatabase worthy."
"Guess I need a front camera on my trike too."  
"The drivers expression as she passed seemed emotionless."
 
First of all, this is certainly CCDB worthy.  Any close call is worthy, hence the name.  I've posted to the site myself.
 
Secondly, folks like to watch the videos I post, but the main reason I run cameras is for forensics.  
 
Thirdly, you do need a rear-facing camera.  Defense attorneys will use your lack of rear view on the accident to their client's advantage.  "Oh, you have no video proof of that happening?  Fine.  Your honor, I move that the lack of evidence should cause this case to be dismissed." (gulp!)  It's the reason I always, always have two cameras, one front-, and one rear-facing, though most of the trouble comes from the rear.
 
Lastly, as you ride more and more, especially these exotic machines, you will learn about the psychology of motorists.  Here's a tip which may receive flak from the ladies reading, but blinking lights....especially those that sparkle, like Planet Bike binkies which turn on and off at different intensities, will cause some women drivers to steer right into you.  One two occasions I have seen them head straight for me and the expression on their faces were of mesmerization, the "expressionless" visage you mentioned.  During the day, you need the headlight as well as the tail light to blink, but especially at night, be sure to have the headlight steady and IF you blink at the rear, have a steady marker as well.  Sparkling lights should be banned from cycling by law because of their dangerous power of attraction.  All blinkies will not only alert, but attract as well, however, sparkling ones will get you killed.    
 
My 2¢