Some updated thoughts, because I realized that I don't actually know what happened to start the whole chain of unfortunate events. I don't like not knowing...My initial thought was that I must have hit one of my side cases as I was sharing that lane, but I don't think that adds up...and here's why...
My right hand and handlebar took the majority of the damage. I definitely hit some part of a tractor trailer on the right side with enough force to bend the handlebar, put a little gash in the grip and and bruise my fingers. I don't think that would have happened had I scraped the right case. There's no damage to that case suggesting I clipped the front part of it either.
I lost my balance to the left side, and the bike ultimately fell to the left. If I hit the right handlebar, it would have turned the bars to the right, shifting the weight of the bike to the left, explaining why I suddenly found myself hopping on my left foot 3 or 4 times trying to keep it up before the bike essentially fell over.
I may have clipped the left side case on the car on my left, which then pushed me into the trailer, hitting the right handle bar, yada yada yada, but I'm not sure. I'm following up with insurance about possible damage to the car on my left. I think there's a good chance that I at least bounced off him a little. Maybe as the tractor trailer started moving again, it inched in a little and clipped me. The order of events is a mystery, and might always be one.
One thing's for sure, I have been rarely lane splitting when I have my side cases on now. I have a couple of rules when it comes to lane sharing, one of which I broke that day. 1) if I'm going over 30 mph, I don't need to lane share, 2) NEVER lane share on the right side of any kind of truck (except passenger pickups), 3) don't lane share on any side of a semi, (well, maybe if traffic is stop and go and I'm on his left and not sharing his lane, and there's a comfortable gap, and the other vehicle has been holding a steady line, and since I'm a safe and cautious rider, then I guess it's ok to break my rule occasionally...or maybe not)
Thanks for letting me ramble guys!
2011 Imperial Red
Givi V46 / V35's SW Motech mounts
Skidmarx hugger Moto Werks bar riser
Mondo Motors LED Driving Lights
A little bit of road rash